BIRDS IN A CITY
We frequently hear people say that
if only they lived in the country they would take
up the study of birds with great interest, but that
a city life prevented any nature study. To show
how untrue this is, I once made a census of wild birds
which were nesting in the New York Zoological Park,
which is situated within the limits of New York City.
Part of the Park is wooded, while much space is given
up to the collections of birds and animals. Throughout
the year thousands of people crowd the walks and penetrate
to every portion of the grounds; yet in spite of this
lack of seclusion no fewer than sixty-one species
build their nests here and successfully rear their
young. The list was made without shooting a single
bird and in each instance the identification was absolute.
This shows what a little protection will accomplish,
while many places of equal area in the country which
are harried by boys and cats are tenanted by a bare
dozen species.
Let us see what a walk in late June,
or especially in July, will show of these bold invaders
of our very city. Wild wood ducks frequently decoy
to the flocks of pinioned birds and sometimes mate
with some of them. One year a wild bird chose
as its mate a little brown female, a pinioned bird,
and refused to desert her even when the brood of summer
ducklings was being caught and pinioned. Such
devotion is rare indeed.
In the top of one of the most inaccessible
trees in the Park a great rough nest of sticks shows
where a pair of black-crowned night herons have made
their home for years, and from the pale green eggs
hatch the most awkward of nestling herons, which squawk
and grow to their prime, on a diet of small fish.
When they are able to fly they pay frequent visits
to their relations in the great flying cage, perching
on the top and gazing with longing eyes at the abundant
feasts of fish which are daily brought by the keepers
to their charges. This duck and heron are the
only ones of their orders thus to honour the Park
by nesting, although a number of other species are
not uncommon during the season of migration.
Of the waders which in the spring
and fall teeter along the bank of the Bronx River,
only a pair or two of spotted sandpipers remain throughout
the nesting period, content to lay their eggs in some
retired spot in the corner of a field, where there
is the least danger to them and to the fluffy balls
of long-legged down which later appear and scurry about.
The great horned owl and the red-tailed hawk formerly
nested in the park, but the frequent noise of blasting
and the building operations have driven them to more
isolated places, and of their relatives there remain
only the little screech owls and the sparrow hawks.
The latter feed chiefly upon English sparrows and
hence are worthy of the most careful protection.
These birds should be encouraged to
build near our homes, and if not killed or driven
away sometimes choose the eaves of our houses as their
domiciles and thus, by invading the very haunts
of the sparrows, they would speedily lessen their
numbers. A brood of five young hawks was recently
taken from a nest under the eaves of a school-house
in this city. I immediately took this as a text
addressed to the pupils, and the principal was surprised
to learn that these birds were so valuable. In
the Park the sparrow hawks nest in a hollow tree,
as do the screech owls.
Other most valuable birds which nest
in the Park are the black-billed and yellow-billed
cuckoos, whose depredations among the hairy and spiny
caterpillars should arouse our gratitude. For
these insects are refused by almost all other birds,
and were it not for these slim, graceful creatures
they would increase to prodigious numbers. Their
two or three light blue eggs are always laid on the
frailest of frail platforms made of a few sticks.
The belted kingfisher bores into the bank of the river
and rears his family of six or eight in the dark,
ill-odoured chamber at the end. Young cuckoos
and kingfishers are the quaintest of young birds.
Their plumage does not come out a little at a time,
as in other nestlings, but the sheaths which surround
the growing feathers remain until they are an inch
or more in length; then one day, in the space of only
an hour or so, the overlapping armour of bluish tiles
bursts and the plumage assumes a normal appearance.
The little black-and-white downy and
the flicker are the two woodpeckers which make the
Park their home. Both nest in hollows bored out
by their strong beaks, but although full of splinters
and sawdust, such a habitation is far superior to
the sooty chimneys in which the young chimney swifts
break from their snow-white eggs and twitter for food.
How impatiently they must look up at the blue sky,
and one would think that they must long for the time
when they can spread their sickle-shaped wings and
dash about from dawn to dark! Is it not wonderful
that one of them should live to grow up when we think
of the fragile little cup which is their home? a
mosaic of delicate twigs held together only by the
sticky saliva of the parent birds.
A relation of theirs though
we should never guess it is sitting upon
her tiny air castle high up in an apple tree not far
away, a ruby-throated hummingbird.
If we take a peep into the nest when the young hummingbirds
are only partly grown, we shall see that their bills
are broad and stubby, like those of the swifts.
Their home, however, is indeed a different affair, a
pinch of plant-down tied together with cobwebs and
stuccoed with lichens, like those which are growing
all about upon the tree. If we do not watch the
female when she settles to her young or eggs we may
search in vain for this tiniest of homes, so closely
does it resemble an ordinary knot on a branch.
The flycatchers are well represented
in the Park, there being no fewer than five species;
the least flycatcher, wood pewee, phoebe, crested
flycatcher, and kingbird. The first two prefer
the woods, the phoebe generally selects a mossy rock
or a bridge beam, the fourth nests in a hollow tree
and often decorates its home with a snake-skin.
The kingbird builds an untidy nest in an apple tree.
Our American crow is, of course, a member of this
little community of birds, and that in spite of persecution,
for in the spring one or two are apt to contract a
taste for young ducklings and hence have to be put
out of the way. The fish crow, a smaller cousin
of the big black fellow, also nests here, easily known
by his shriller, higher caw. A single pair of
blue jays nest in the Park, but the English starling
occupies every box which is put up and bids fair to
be as great or a greater nuisance than the sparrow.
It is a handsome bird and a fine whistler, but when
we remember how this foreigner is slowly but surely
elbowing our native birds out of their rightful haunts,
we find ourselves losing sight of its beauties.
The cowbird, of course, imposes her eggs upon many
of the smaller species of birds, while our beautiful
purple grackle, meadow lark, red-winged blackbird,
and the Baltimore and orchard orioles rear their young
in safety. The cardinal, scarlet tanager, indigo
bunting, and rose-breasted grosbeak form a quartet
of which even a tropical land might well be proud,
and the two latter species have, in addition to brilliant
plumage, very pleasing songs. Such wealth of
aesthetic characteristics are unusual in any one species,
the wide-spread law of compensation decreeing otherwise.
More sombre hued seed-eaters which live their lives
in the Park are towhees, swamp, song, field, and chipping
sparrows. The bank and barn swallows skim over
field and pond all through the summer, gleaning their
insect harvest from the air, and building their nests
in the places from which they have taken their names.
The rare rough-winged swallow deigns to linger and
nest in the Park as well as do his more common brethren.
The dainty pensile nests which become
visible when the leaves fall in the autumn are swung
by four species of vireos, the white-eyed, red-eyed,
warbling, and yellow-throated. Of the interesting
and typically North American family of wood warblers
I have numbered no fewer than eight which nest in
the Park; these are the redstart, the yellow-breasted
chat, northern yellow-throat, oven-bird, the yellow
warbler, blue-winged, black-and-white creeping warblers,
and one other to be mentioned later.
Injurious insects find their doom
when the young house and Carolina wrens are on the
wing. Catbirds and robins are among the most abundant
breeders, while chickadees and white-breasted nuthatches
are less often seen. The bluebird haunts the
hollow apple trees, and of the thrushes proper the
veery or Wilson’s and the splendid wood thrush
sing to their mates on the nests among the saplings.
The rarest of all the birds which
I have found nesting in the Park is a little yellow
and green warbler, with a black throat and sides of
the face, known as the Lawrence warbler. Only
a few of his kind have ever been seen, and strange
to say his mate was none other than a demure blue-winged
warbler. His nest was on the ground and from it
six young birds flew to safety and not to museum drawers.
NIGHT MUSIC OF THE SWAMP
To many, a swamp or marsh brings only
the very practical thought of whether it can be readily
drained. Let us rejoice, however, that many marshes
cannot be thus easily wiped out of existence, and hence
they remain as isolated bits of primeval wilderness,
hedged about by farms and furrows. The water
is the life-blood of the marsh, drain it,
and reed and rush, bird and batrachian, perish or
disappear. The marsh, to him who enters it in
a receptive mood, holds, besides mosquitoes and stagnation, melody,
the mystery of unknown waters, and the sweetness of
Nature undisturbed by man.
The ideal marsh is as far as one can
go from civilisation. The depths of a wood holds
its undiscovered secrets; the mysterious call of the
veery lends a wildness that even to-day has not ceased
to pervade the old wood. There are spots overgrown
with fern and carpeted with velvety wet moss; here
also the skunk cabbage and cowslip grow rank among
the alders. Surely man cannot live near this
place but the tinkle of a cowbell comes
faintly on the gentle stirring breeze and
our illusion is dispelled, the charm is broken.
But even to-day, when we push the
punt through the reeds from the clear river into the
narrow, tortuous channel of the marsh, we have left
civilisation behind us. The great ranks of the
cat-tails shut out all view of the outside world;
the distant sounds of civilisation serve only to accentuate
the isolation. It is the land of the Indian, as
it was before the strange white man, brought from
afar in great white-sailed ships, came to usurp the
land of the wondering natives. At any moment we
fancy that we may see an Indian canoe silently round
a bend in the channel.
The marsh has remained unchanged since
the days when the Mohican Indians speared fish there.
We are living in a bygone time. A little green
heron flies across the water. How wild he is;
nothing has tamed him. He also is the same now
as always. He does not nest in orchard or meadow,
but holds himself aloof, making no concessions to
man and the ever increasing spread of his civilisation.
He does not come to his doors for food. He can
find food for himself and in abundance; he asks only
to be let alone. Nor does he intrude himself.
Occasionally we meet him along our little meadow stream,
but he makes no advances. As we come suddenly
upon him, how indignant he seems at being disturbed
in his hunting. Like the Indian, he is jealous
of his ancient domain and resents intrusion. He
retires, however, throwing back to us a cry of disdain.
Here in the marsh is the last stand of primitive nature
in the settled country; here is the last stronghold
of the untamed. The bulrushes rise in ranks, like
the spears of a great army, surrounding and guarding
the colony of the marsh.
There seems to be a kinship between
the voices of the marsh dwellers. Most of them
seem to have a muddy, aquatic note. The boom of
the frog sounds like some great stone dropped into
the water; the little marsh wren’s song is the
“babble and tinkle of water running out of a
silver flask.”
The blackbird seems to be the one
connecting link between the highlands and the lowlands.
Seldom does one see other citizens of the marsh in
the upland. How glorious is the flight of a great
blue heron from one feeding-ground to another!
He does not tarry over the foreign territory, nor
does he hurry. With neck and head furled close
and legs straight out behind, he pursues his course,
swerving neither to the right nor the left.
“Vainly the fowler’s
eye
Might mark thy distant flight to do thee
wrong,
As darkly painted on the crimson sky
Thy figure floats
along.”
The blackbirds, however, are more
neighbourly. They even forage in the foreign
territory, returning at night to sleep.
In nesting time the red-wing is indeed
a citizen of the lowland. His voice is as distinctive
of the marsh as is the croak of the frog, and from
a distance it is one of the first sounds to greet
the ear. How beautiful is his clear whistle with
its liquid break! Indeed one may say that he is
the most conspicuous singer of the marshlands.
His is not a sustained song, but the exuberant expression
of a happy heart.
According to many writers the little
marsh wren is without song. No song! As
well say that the farmer boy’s whistling as he
follows the plough, or the sailor’s song as
he hoists the sail, is not music! All are the
songs of the lowly, the melody of those glad to be
alive and out in the free air.
When man goes into the marsh, the
marsh retires within itself, as a turtle retreats
within his shell. With the exception of a few
blackbirds and marsh wrens, babbling away the nest
secret, and an occasional frog’s croak, all
the inhabitants have stealthily retired. The spotted
turtle has slid from the decayed log as the boat pushed
through the reeds. At our approach the heron
has flown and the little Virginia rail has scuttled
away among the reeds.
Remain perfectly quiet, however, and
give the marsh time to regain its composure.
One by one the tenants of the swamp will take up the
trend of their business where it was interrupted.
All about, the frogs rest on the green
carpet of the lily pads, basking in the sun.
The little rail again runs among the reeds, searching
for food in the form of small snails. The blackbirds
and wrens, most domestic in character, go busily about
their home business; the turtles again come up to
their positions, and a muskrat swims across the channel.
One hopes that the little colony of marsh wren homes
on stilts above the water, like the ancient lake dwellers
of Tenochtitlan, may have no enemies. But the
habit of building dummy nests is suggestive that the
wee birds are pitting their wits against the cunning
of some enemy, and suspicion rests upon
the serpent.
As evening approaches and the shadows
from the bordering wood point long fingers across
the marsh, the blackbirds straggle back from their
feeding-grounds and settle, clattering, among the reeds.
Their clamour dies gradually away and night settles
down upon the marsh.
All sounds have ceased save the booming
of the frogs, which but emphasises the loneliness
of it all. A distant whistle of a locomotive dispels
the idea that all the world is wilderness. The
firefly lamps glow along the margin of the rushes.
The frogs are now in full chorus, the great bulls
beating their tom-toms and the small fry filling in
the chinks with shriller cries. How remote the
scene and how melancholy the chorus!
To one mind there is a quality in
the frogs’ serenade that strikes the chord of
sadness, to another the chord of contentment, to still
another it is the chant of the savage, just as the
hoot of an owl or the bark of a fox brings vividly
to mind the wilderness.
Out of the night comes softly the
croon of a little screech owl that cry
almost as ancient as the hills. It belongs with
the soil beneath our towns. It is the spirit
of the past crying to us. So the dirge of the
frog is the cry of the spirit of river and marshland.
Our robins and bluebirds are of the
orchard and the home of man, but who can claim neighbourship
to the bittern or the bullfrog? There is nothing
of civilisation in the hoarse croak of the great blue
heron. These are all barbarians and their songs
are of the untamed wilderness.
The moon rises over the hills.
The mosquitoes have become savage. The marsh
has tolerated us as long as it cares to, and we beat
our retreat. The night hawks swoop down and boom
as they pass overhead. One feels thankful that
the mosquitoes are of some good in furnishing food
to so graceful a bird.
A water snake glides across the channel,
leaving a silver wake in the moonlight. The frogs
plunk into the water as we push past. A night
heron rises from the margin of the river and slowly
flops away. The bittern booms again as we row
down the peaceful river, and we leave the marshland
to its ancient and rightful owners.
And the marsh is meshed with a
million veins,
That like as with rosy and silvery essences flow
In the rose and silver evening glow.
Farewell, my lord Sun!
The creeks overflow; a thousand rivulets run
’Twixt the roots of the sod; the blades
of the marsh grass stir;
Passeth a hurrying sound of wings that westward
whirr.
Sidney
Lanier.
THE COMING OF MAN
If we betake ourselves to the heart
of the deepest forests which are still left upon our
northern hills, and compare the bird life which we
find there with that in the woods and fields near
our homes, we shall at once notice a great difference.
Although the coming of mankind with his axe and plough
has driven many birds and animals far away or actually
exterminated them, there are many others which have
so thrived under the new conditions that they are
far more numerous than when the tepees of the red men
alone broke the monotony of the forest.
We might walk all day in the primitive
woods and never see or hear a robin, while in an hour’s
stroll about a village we can count scores. Let
us observe how some of these quick-witted feathered
beings have taken advantage of the way in which man
is altering the whole face of the land.
A pioneer comes to a spot in the virgin
forest which pleases him and proceeds at once to cut
down the trees in order to make a clearing. The
hermit thrush soothes his labour with its wonderful
song; the pileated woodpecker pounds its disapproval
upon a near-by hollow tree; the deer and wolf take
a last look out through the trees and flee from the
spot forever. A house and barn arise; fields
become covered with waving grass and grain; a neglected
patch of burnt forest becomes a tangle of blackberry
and raspberry; an orchard is set out.
When the migrating birds return, they
are attracted to this new scene. The decaying
wood of fallen trees is a paradise for ants, flies,
and beetles; offering to swallows, creepers, and flycatchers
feasts of abundance never dreamed of in the primitive
forests. Straightway, what must have been a cave
swallow becomes a barn swallow; the haunter of rock
ledges changes to an eave swallow; the nest in the
niche of the cliff is deserted and phoebe becomes
a bridgebird; cedarbirds are renamed cherrybirds, and
catbirds and other low-nesting species find the blackberry
patch safer than the sweetbrier vine in the deep woods.
The swift leaves the lightning-struck hollow tree
where owl may harry or snake intrude, for the chimney
flue sooty but impregnable.
When the great herds of ruminants
disappear from the western prairies, the buffalo birds
without hesitation become cowbirds, and when the plough
turns up the never-ending store of grubs and worms
the birds lose all fear and follow at the very heels
of the plough-boy: grackles, vesper sparrows,
and larks in the east, and flocks of gulls farther
to the westward.
The crow surpasses all in the keen
wit which it pits against human invasion and enmity.
The farmer declares war (all unjustly) against these
sable natives, but they jeer at his gun and traps and
scarecrows, and thrive on, killing the noxious insects,
devouring the diseased corn-sprouts, doing
great good to the farmer in spite of himself.
The story of these sudden adaptations
to conditions which the birds could never have foreseen
is a story of great interest and it has been but half
told. Climb the nearest hill or mountain or even
a tall tree and look out upon the face of the country.
Keep in mind you are a bird and not a human, you
neither know nor understand anything of the reason
for these strange sights, these bipeds
who cover the earth with great square structures,
who scratch the ground for miles, who later gnaw the
vegetation with great shining teeth, and who are only
too often on the look out to bring sudden death if
one but show a feather. What would you do?
THE SILENT LANGUAGE OF ANIMALS
What a great difference there is in
brilliancy of colouring between birds and the furry
creatures. How the plumage of a cardinal, or indigo
bunting, or hummingbird glows in the sunlight, and
reflects to our eyes the most intense vermilion or
indigo or an iridescence of the whole gamut of colour.
On the other hand, how sombrely clad are the deer,
the rabbits, and the mice; gray and brown and white
being the usual hue of their fur.
This difference is by no means accidental,
but has for its cause a deep significance, all-important
to the life of the bird or mammal. Scientists
have long known of it, and if we unlock it from its
hard sheathing of technical terms, we shall find it
as simple and as easy to understand as it is interesting.
When we once hold the key, it will seem as if scales
had fallen from our eyes, and when we take our walks
abroad through the fields and woods, when we visit
a zoological park, or even see the animals in a circus,
we shall feel as though a new world were opened to
us.
No post offices, or even addresses,
exist for birds and mammals; when the children of
the desert or the jungle are lost, no detective or
policeman hastens to find them, no telephone or telegraph
aids in the search. Yet, without any of these
accessories, the wild creatures have marvellous systems
of communication. The five senses (and perhaps
a mysterious sixth, at which we can only guess) are
the telephones and the police, the automatic sentinels
and alarms of our wild kindred. Most inferior
are our own abilities in using eyes, nose, and ears,
when compared with the same functions in birds and
animals.
Eyes and noses are important keys
to the bright colours of birds and comparative sombreness
of hairy-coated creatures. Take a dog and an oriole
as good examples of the two extremes. When a dog
has lost his master, he first looks about; then he
strains his eyes with the intense look of a near-sighted
person, and after a few moments of this he usually
yelps with disappointment, drops his nose to the ground,
and with unfailing accuracy follows the track of his
master. When the freshness of the trail tells
him that he is near its end he again resorts to his
eyes, and is soon near enough to recognise the face
he seeks. A fox when running before a hound may
double back, and make a close reconnaissance near his
trail, sometimes passing in full view without the
hound’s seeing him or stopping in following
out the full curve of the trail, so completely does
the wonderful power of smell absorb the entire attention
of the dog.
Let us now turn to the oriole.
As we might infer, the nostrils incased in horn render
the sense of smell of but slight account. It is
hard to tell how much a bird can distinguish in this
way probably only the odour of food near
at hand. However, when we examine the eye of our
bird, we see a sense organ of a very high order.
Bright, intelligent, full-circled, of great size compared
to the bulk of the skull, protected by three complete
eyelids; we realise that this must play an important
part in the life of the bird. There are, of course,
many exceptions to such a generalisation as this.
For instance, many species of sparrows are dull-coloured.
We must remember that the voice the calls
and songs of birds is developed to a high
degree, and in many instances renders bright colouring
needless in attracting a mate or in locating a young
bird.
As we have seen, the sense of smell
is very highly developed among four-footed animals,
but to make this efficient there must be something
for it to act upon; and in this connection we find
some interesting facts of which, outside of scientific
books, little has been written. On the entire
body, birds have only one gland the oil
gland above the base of the tail, which supplies an
unctuous dressing for the feathers. Birds, therefore,
have not the power of perspiring, but compensate for
this by very rapid breathing. On the contrary,
four-footed animals have glands on many portions of
the body. Nature is seldom contented with the
one primary function which an organ or tissue performs,
but adjusts and adapts it to others in many ingenious
ways. Hence, when an animal perspires, the pores
of the skin allow the contained moisture to escape
and moisten the surface of the body; but in addition
to this, in many animals, collections of these pores
in the shape of large glands secrete various odours
which serve important uses. In the skunk such
a gland is a practically perfect protection against
attacks from his enemies. He never hurries and
seems not to know what fear is a single
wave of his conspicuous danger signal is sufficient
to clear his path.
In certain species of the rhinoceros
there are large glands in the foot. These animals
live among grass and herbage which they brush against
as they walk, and thus “blaze” a plain
trail for the mate or young to follow. There
are few if any animals which care to face a rhinoceros,
so the scent is incidentally useful to other creatures
as a warning.
It is believed that the hard callosities
on the legs of horses are the remains of glands which
were once upon a time useful to their owners; and
it is said that if a paring from one of these hard,
horny structures be held to the nose of a horse, he
will follow it about, hinting, perhaps, that in former
days the scent from the gland was an instinctive guide
which kept members of the herd together.
“Civet,” which is obtained
from the civet cat, and “musk,” from the
queer little hornless musk deer, are secretions of
glands. It has been suggested that the defenceless
musk deer escapes many of its enemies by the similarity
of its secretion to the musky odour of crocodiles.
In many animals which live together in herds, such
as the antelope and deer, and which have neither bright
colours nor far-reaching calls to aid straying members
to regain the flock, there are large and active scent
glands. The next time you see a live antelope
in a zoological park, or even a stuffed specimen,
look closely at the head, and between the eye and the
nostril a large opening will be seen on each, side,
which, in the living animal, closes now and then,
a flap of skin shutting it tight.
Among pigs the fierce peccary is a
very social animal, going in large packs; and on the
back of each of these creatures is found a large gland
from which a clear watery fluid is secreted. Dogs
and wolves also have their odour-secreting glands
on the back, and the “wolf-pack” is proverbial.
The gland of the elephant is on the
temple, and secretes only when the animal is in a
dangerous mood, a hint, therefore, of opposite significance
to that of the herding animals, as this says, “Let
me alone! stay away!” Certain low species of
monkeys, the lemurs, have a remarkable bare patch
on the forearm, which covers a gland serving some use.
If we marvel at the keenness of scent
among animals, how incredible seems the similar sense
in insects similar in function, however
different the medium of structure may be. Think
of the scent from a female moth, so delicate that
we cannot distinguish it, attracting a male of the
same species from a distance of a mile or more.
Entomologists sometimes confine a live female moth
or other insect in a small wire cage and hang it outdoors
in the evening, and in a short time reap a harvest
of gay-winged suitors which often come in scores,
instinctively following up the trail of the delicate,
diffused odour. It is surely true that the greatest
wonders are not always associated with mere bulk.
INSECT MUSIC
Among insects, sounds are produced
in many ways, and for various reasons. A species
of ant which makes its nest on the under side of leaves
produces a noise by striking the leaf with its head
in a series of spasmodic taps, and another ant is
also very interesting as regards its sound-producing
habit. “Individuals of this species are
sometimes spread over a surface of two square yards,
many out of sight of the others; yet the tapping is
set up at the same moment, continued exactly the same
space of time, and stopped at the same instant.
After the lapse of a few seconds, all recommence simultaneously.
The interval is always approximately of the same duration,
and each ant does not beat synchronously with every
other ant, but only like those in the same group,
so the independent tappings play a sort of tune, each
group alike in time, but the tapping of the whole
mass beginning and ending at the same instant.
This is doubtless a means of communication.”
The organ of hearing in insects is
still to be discovered in many forms, but in katydids
it is situated on the middle of the fore-legs; in
butterflies on the sides of the thorax, while the tip
of the horns or antennæ of many insects is considered
to be the seat of this function. In all it is
little more than a cavity, over which a skin is stretched
like a drum-head, which thus reacts to the vibration.
This seems to be very often “tuned,” as
it were, to the sounds made by the particular species
in which it is found. A cricket will at times
be unaffected by any sound, however loud, while at
the slightest “screek” or chirp of its
own species, no matter how faint, it will start its
own little tune in all excitement.
The songs of the cicadas are noted
all over the world. Darwin heard them while anchored
half a mile off the South American coast, and a giant
species of that country is said to produce a noise
as loud as the whistle of a locomotive. Only
the males sing, the females being dumb, thus giving
rise to the well-known Grecian couplet:
“Happy the
cicadas’ lives,
For they all have voiceless wives.”
Anyone who has entered a wood where
thousands of the seventeen-year cicadas were hatching
has never forgotten it. A threshing machine, or
a gigantic frog chorus, is a fair comparison, and
when a branch loaded with these insects is shaken,
the sound rises to a shrill screech or scream.
This noise is supposed in fact is definitely
known to attract the female insect, and
although there may be in it some tender notes which
we fail to distinguish, yet let us hope that the absence
of any highly organised auditory organ may result
in reducing the effect of a steam-engine whistle to
an agreeable whisper! It is thought that the vibrations
are felt rather than heard, in the sense that we use
the word “hear”; if one has ever had a
cicada zizz in one’s hand, the electrical
shocks which seem to go up the arm help the belief
in this idea. To many of us the song of the cicada softened
by distance will ever be pleasant on account
of its associations. When one attempts to picture
a hot August day in a hay-field or along a dusty road,
the drowsy zee-ing of this insect, growing louder
and more accelerated and then as gradually dying away,
is a focus for the mind’s eye, around which
the other details instantly group themselves.
The apparatus for producing this sound
is one of the most complex in all the animal kingdom.
In brief, it consists of two external doors, capable
of being partly opened, and three internal membranes,
to one of which is attached a vibrating muscle, which,
put in motion, sets all the others vibrating in unison.
We attach a great deal of importance
to the fact of being educated to the appreciation
of the highest class of music. We applaud our
Paderewski, and year after year are awed and delighted
with wonderful operatic music, yet seldom is the limitation
of human perception of musical sounds considered.
If we wish to appreciate the limits
within which the human ear is capable of distinguishing
sounds, we should sit down in a meadow, some hot midsummer
day, and listen to the subdued running murmur of the
myriads of insects. Many are very distinct to
our ears and we have little trouble in tracing them
to their source. Such are crickets and grasshoppers,
which fiddle and rasp their roughened hind legs against
their wings. Some butterflies have the power
of making a sharp crackling sound by means of hooks
on the wings. The katydid, so annoying to some
in its persistent ditty, so full of reminiscences
to others of us, is a large, green, fiddling grasshopper.
Another sound which is typical of
summer is the hum of insects’ wings, sometimes,
as near a beehive, rising to a subdued roar. The
higher, thinner song of the mosquito’s wings
is unfortunately familiar to us, and we must remember
that the varying tone of the hum of each species may
be of the greatest importance to it as a means of
recognition. Many beetles have a projecting horn
on the under side of the body which they can snap
against another projection, and by this means call
their lady-loves, literally “playing the bones”
in their minstrel serenade.
Although we can readily distinguish
the sounds which these insects produce, yet there
are hundreds of small creatures, and even large ones,
which are provided with organs of hearing, but whose
language is too fine for our coarse perceptions.
The vibrations chirps, hums, and clicks can
be recorded on delicate instruments, but, just as there
are shades and colours at both ends of the spectrum
which our eyes cannot perceive, so there are tones
running we know not how far beyond the scale limits
which affect our ears. Some creatures utter noises
so shrill, so sharp, that it pains our ears to listen
to them, and these are probably on the borderland
of our sound-world.
Pipe, little minstrels
of the waning year,
In gentle concert pipe!
Pipe the warm noons; the mellow harvest
near;
The apples dropping ripe;
The sweet sad hush on
Nature’s gladness laid;
The sounds through silence heard!
Pipe tenderly the passing of the year.
Harriet Mcewen
Kimball.
I love to hear thine
earnest voice,
Wherever thou art hid,
Thou testy little dogmatist,
Thou pretty Katydid!
Thou mindest me of gentlefolks,
Old gentlefolks are they,
Thou say’st an undisputed
thing
In such a solemn way.
Oliver Wendell Holmes.