Richard Kearton

“ Mechanical Construction of Eggs.—We now come to another phase of the protective principle, even more remarkable than those we have already discussed, and equally useful. This is in the mechanical construction of eggs to suit their situation and surrounding conditions. What an admirable provision Nature has shown in placing the axis of a bird's egg just where it will prevent it rolling off a flat surface, such as a ledge of rock, when moved by the terrible gusts of wind that sweep over high latitudes, or perhaps roughly moved by the parent bird suddenly fluttering off when scared. ”

“ People have been content to know that the wonderful architecture and mechanism of a bird's nest was the outcome of a force vaguely known as instinct, without taking the trouble to discover its workings, extent, or limits. ”

“ I will endeavour to point out how Nature has solved the problem of preservation; and it is equally interesting whether by the self-governed action of the bird, or the blind following of an impulse known only as instinct. ”

“ And, on the other hand, if these seeming departures from instinct be admitted as due to reason, it seems strange that whilst some birds are capable of this, others exhibit what seems to human understanding profound stupidity. I have known birds vainly try to build in positions where it was impossible for a nest to rest, each piece of material falling to the ground, until sufficient had been collected for a great many nests; yet the bird kept on collecting sticks, moss, and grasses, until probably she was obliged to drop her eggs in the fields. ”

“ The Common Wild Duck is also liable to depart widely from her usual habit in the selection of a site for her nest, sometimes adopting a Crow's nest, and even the tower of a church, which latter has occasioned much speculation amongst naturalists as to how the parent bird managed to convey her progeny safely to water.
The Fly-catcher is amongst the foremost of our eccentric birds in the choice of breeding quarters, its nest having been found in street lamps in different parts of the country, and in one instance on the head of a hoe hanging against the wall of a tool-house. ”

“ Supposing it is the secret of their beautiful nest-building, the house sparrow adopting trees to nest in where the houses are built of brick and lack crevices, or the falcon deserting its usual high inaccessible crag and nesting on the ground; it cannot possibly account for a young duck taking the water directly it has left the shell, or the habit of young plovers, snipes, grouse, and other birds crouching flat when danger is overhead even as soon as they are hatched. ”

“ I have watched the bird through my binoculars, - 76 - when put off her eggs, fly to some distance and remain quite flat upon the ground, with which she closely harmonises. The nest is a mere unlined hollow, with sometimes a few bents in it, which may as easily as not have been blown there. Her eggs number two, of light buffish to clay-brown ground colour, blotched and spotted with blackish-brown and grey. I have noticed that one egg in a nest will differ radically in the size and intensity of its markings from the others. ”

“ Birds whose down has protected them during the early part of their history, become aware of the dangers which threaten a more conspicuous plumage, which is a marvellous thing, whether acquired by reasoning or instinct. This is proved by the action of birds of the same order. The Golden Plover, with plumage in harmony with the surroundings of her nest (her feathers being still further subdued in colour during the breeding season) , sits much closer than the Green Plover, although a shyer bird, with eggs possessing the same protective qualities. ”

“ A sheltered and darkened situation is generally chosen by the Wheat-ear wherein to build her nest—chinks of stone walls, the ruins of cairns, in old rabbit-burrows, under stones on moors, mountain wilds, &c. The nest, not very artistic in construction, is composed of a variety of materials, such as bents, grass roots pulled up by the sheep when grazing, and dried in the sun, hair and wool gathered from brambles, corners of rocks, and walls against which the sheep have rubbed themselves. The eggs number five or six, and are of a pale greenish-blue colour unspotted. ”

“ The nest is composed of clay or mud mixed with straw, hay, and rushes, lined with soft light feathers, usually gathered whilst the bird is on the wing. When a boy, I have amused myself for hours flying feathers for the dexterous Swallows and Martins to carry off to their nests, and have always observed that if the Swallow let a feather fall from her nest whilst building it, and did not catch it before reaching the ground, she allowed it to remain there, often to betray the locality of her eggs. ”

“ This bold predatory bird is like the Raven, monogamous, and sticks to its mate for life. They use the same nest often year after year, driving their young forth as soon as they are capable of looking after themselves. On an average four or five eggs are laid, of a grey-green colour, blotched and spotted with a smoky brown. ”

“ Instinct is an extremely difficult power to define, and whether it be described as "hereditary habit," or simply accepted as an unknown law of Nature blindly followed by its possessor, it cannot be denied that it is the outcome of conditions, and always amenable to them. ”

“ Three familiar instances of special modifications in the plumage of the female are to be found in the black grouse, pheasant, and blackbird, all nidificating in situations more or less fraught with danger. Remarkable again is the fact that where the female is more conspicuously marked than the male the latter takes upon himself the duties of incubation entirely, or renders a great deal of aid, which is strong proof that dull subdued colours have been adopted for the preservation of the young in their several stages of helplessness. ”

“ Nature never made such a mistake as the introduction of rabbits and sparrows into Australia. They are two potent forces turned loose into practically unrestricted space, without any of their natural limiting influences.
Protective Colouring of Birds.—The protective colour of the plumage of certain birds is the great source of their safety during incubation. For instance, birds which nidificate on the ground, such as Black and Red Grouse, Pheasants, Partridges, and Sandpipers, all subject to the depredations of winged and creeping enemies, are preserved by the modification of their tints. ”

“ The highest mountain-tops of Scotland and the Shetlands are patronised by the Snow Bunting during the breeding season. It makes its nest of withered grass, fine roots, and moss, and lines it with down, wool, hair, or feathers, and situates it in crevices of rock or amongst loose stones. The eggs number from four to eight, but five or six are generally found, varying from dull white to very light greenish-blue in ground colour, spotted and blotched with reddish-brown, and occasionally streaked with blackish-brown. ”

“ Unlike its congener, the Skylark, this bird is limited to certain localities in our islands. Whilst it is fairly abundant in some districts, it is seldom or never seen in others. It is highly esteemed as a song-bird, and consequently suffers at the hands of professional bird-catchers, especially as its young begin to carol at an early period of their existence. Its nest is situated on the ground, usually well concealed beneath a tuft of grass or low plant, and is composed of grass, bents, moss, and hairs, the coarser material used on the outside and the finer to line the interior. ”

“ The Woodcock lays four eggs of a yellow-white colour, blotched with pale chestnut-brown. Her nest is generally found amongst the underwood at the foot of a tree, where she does not appear to try to avoid its being seen, but scratches a slight hollow, lining it with dead leaves and the withered fronds of the bracken. Although the great bulk of these birds are migrants, it is now proved beyond doubt that many are bred yearly in this country. Like the Partridge, Grouse, &c., the young leave the nest as soon as hatched, and are most carefully looked after by the parent bird. ”

“ Lastly, we come to the beautiful harmony of colouring of the eggs with surrounding objects, rendering them often very difficult to find, even by a practised eye, and the scant nest still further aiding in the chances against discovery. ”

“ She often adopts a rabbit-burrow if it is situated in the immediate neighbourhood of the sea, and should the original owner or excavator be bold enough to dispute the right of proprietorship, this remarkable bird is not at all indisposed to do battle for possession of the situation her fancy has selected as a desirable place in which to carry out the duties imposed by Nature's law for the perpetuation of the species. ”

“ This bird cannot really be said to make a nest of any kind, simply selecting some natural depression in the earth, beneath the shelter of a furze-bush or common bracken. She lays two eggs, which are grey, beautifully spotted, and marbled or veined with dark brown and tints of a bluish-lead colour, glossy. The female sits so closely, and harmonises so well with her surroundings, that, unless one happens to detect her beautiful large eye, the chances are very much against finding her nest. ”

“ Low rocky islands are the favourite breeding places of this Gull, and they are now particularly numerous at the Farne Islands, where I have seen the eggs lying about so thickly that the visitor had to exercise great care to avoid treading upon them. Sometimes quite a large quantity of seaweed is used in making the nest, at others a few bits of grass and roots, and in some cases, where bare peat earth is available, simply a hollow is scratched out. ”

“ It must not be supposed I overlook another important feature in the covered nest of this bird, which is, however, subservient to the bird's desire to hide her white plumage and eggs, which renders it equally preservative in character. The bird generally builds near a waterfall, often quite behind, undoubtedly for the safety this situation affords, and she is not only obliged to construct a covered nest, but one which must keep out the constant dripping of water percolating through fissures in the rock. ”

“ Scandinavia and other countries situated in high latitudes are the breeding haunts of this little bird, which builds a nest very similar to the Chaffinch. It is placed fourteen or twenty feet from the ground, in the fork of a branch shooting out from the trunk of a birch or spruce fir-tree, and composed of moss, lichens, bark, mixed with thistle-down, and lined with fine grass and feathers. ”

“ A Pigeon hatches its young out in sixteen days, and by a special process and careful assiduity feeds them until they are almost full grown. A Fowl, though not capable of feeding her young in the same way, possesses the power of defending her offspring, finding and selecting suitable food, and attending to their education generally in a higher - 12 - degree than the Duck can bestow on her progeny, which take four weeks to hatch. ”

“ He infers that these colours represent those of far distant progenitors; but as safety lies in these modified tints, and preservation being Nature's chief problem, it is more reasonable to suppose that Nature lends this means of protection whilst the bird is in its most helpless condition, for an evolution that tends to increase dangerously conspicuous colours would only seem to invite extinction. ”

“ Take only one specimen, and not until you have reason to believe the bird has done laying. Never under any circumstances take an egg when you have ground to suppose incubation has commenced, or is in an advanced stage, for besides the cruelty of the thing, it will often be of no use. ”

“ Despite being much harassed by the bird-catching fraternity to supply the demand for it as a cage pet, if not actually approving of confinement, it seems to prefer the close proximity of man, often selecting as a nesting situation gardens and orchards, and has even been known to build in rose-bushes and other trees trained against - 22 - a dwelling-house. The nest is composed of moss, a little hay and wool, lined with seed-down of the willow and hair neatly woven together. The eggs are four or five in number ”

“ When the contents have been emptied wash the egg out with clean water, introduced through the blow-pipe, being careful not to wet the outside more than necessary, or rub it too - 20 - much, as the beautiful colouring of many eggs is easily displaced. When the egg has been blown, and properly dried inside and out, an operation needing some care, the hole should be covered over with a neat piece of gummed paper, on which the name of the specimen may be written, this being found especially useful when eggs of different kinds get mixed. ”

“ A Fieldfare's nest has never, within my personal knowledge, been found in the British Isles, the birds breeding in the more northern parts of Europe, such as Norway and - 58 - Sweden, in large numbers. They build their nests near to the trunks of spruce trees, employing such materials as sticks and coarse grass, and weeds gathered wet, intermixed with clay, and lined internally with long grass. The eggs number from three to six, somewhat resembling those of the Blackbird or Ring Ouzel. ”

“ The labours of the Rabbit are utilised by the Shieldrake, and almost indispensable to her for incubation purposes, as she deposits dried flags, bents, reeds, and a liberal quantity of down, plucked from her own body, at the bottom of a deep burrow, after having enlarged and improved it to suit her purpose. She lays from eight even to twice that number of eggs, of a very smooth, roundish, oblong shape. They are cream colour, or nearly white in colour. ”