The cock draws off the owners of the nest by placing himself near them and screaming. The crows, being short-tempered birds, rise to the bait and give chase. While they are absent the hen slips into the nest and lays her egg. If sufficient time be allowed she destroys one or more of the eggs already in the nest. She works hurriedly, for the operation is a dangerous one. If she be caught on the nest the crows will try to kill her and will, as likely as not, succeed. The life of the koel is by no means all beer and skittles. If the hen koel gets away before the crows return they fail to notice the strange egg, although it differs markedly from their blue and yellow ones, being smaller and olive green blotched with yellow. Nor do they seem to miss their own eggs which are lying broken on the ground beneath the nest. Sometimes the koel returns and lays a second egg in the same nest, and destroys all the legitimate eggs, for she can tell the difference between her eggs and those of the crow. Thus it sometimes happens that the deluded crows rear up only two koels. They never seem to notice the trick that has been played upon them. Even when the black-skinned young koels hatch out, the crows are apparently unable to distinguish them from their own pink-coloured young.
The young koel invariably emerges from the egg before his foster-brothers and thus begins life with a start. He develops much more quickly than they do, but, unlike the common cuckoo, ejects neither the other eggs in the nest, nor the young birds as they hatch out. He lives on good terms with the other occupants of the nest, and when fledged, makes laudable if ludicrous attempts to caw.
The natives assert that the hen koel keeps an eye on her offspring all the while they are in the crow’s nest and takes charge of them after they leave it. I am almost certain that this is not so.
Early in April the paradise flycatchers (Terpsiphone paradisi) arrive. The hen is a chestnut bird with a black head and crest and a white breast; she looks something like a bulbul. The cock when quite young is similarly attired. At his first autumnal moult, that is to say when he is about fifteen months old, his two middle tail feathers outgrow the rest by twelve or thirteen inches. In his third year white feathers begin to appear among the chestnut ones, and after his third autumnal moult he emerges as a magnificent white bird with a metallic black head and crest. His elongated tail feathers now look like white satin streamers. He retains this livery for the remainder of his life, and looks so magnificent in it as to merit well his name. It is impossible to mistake the paradise flycatcher. There is no other bird like it. It is a denizen of orchards and shady groves and may always be seen during the hot weather in the beautiful wood on the bank of the Ravi between the bridge of boats and the railway. A cock paradise flycatcher, in the full glory of his white plumage, as he flits like a sprite through the leafy glade, is a sight never to be forgotten. The movements of his long tail feathers as he pursues his course are as graceful as those of the folds of the gossamer garments of a skilled serpentine dancer.
The nest is a deep cup, in shape like an inverted cone, plastered exteriorly with cobweb and white cocoons. It is almost invariably placed in a fork near the end of one of the lower branches of a tree. Both cock and hen take part in nest building and incubation. As the cock sits his long white tail feathers hang down over the side of the nest and render him very conspicuous. The most expeditious way of finding a paradise flycatcher’s nest is to look out for a sitting cock. The alarm note of this species is a sharp harsh Tschit, but the cock is also able to warble a very sweet song.
The Indian oriole (Oriolus kundoo) is another gorgeous summer visitor to the Punjab. The cock is arrayed in rich golden yellow. His bill is pink and he has a black patch on each side of his head, there is also some black in his wings and tail. The hen is clad in greenish yellow and is neither so showy nor so handsome. The oriole is commonly called the mango bird by Europeans in India. I have never been able to discover whether the bird is so named because the cock is not unlike a ripe mango in colour, or because orioles are to be found in almost every mango tope. Oriolus kundoo is a bird of many notes. Of these the most pleasing is a mellow lorio, lorio. Another note very frequently heard is a loud but not unmusical tew. The alarm note of the species is a plaintive cry, not easy to describe. It is uttered whenever a human being approaches the nest. The hen alone incubates, but she is not often seen upon the nest, for she leaves it at the first sound of a human footfall.
The nest of the oriole is a wonderful structure. It is a cradle slung on to a stout forked branch. The bird tears with its beak strips of the soft bark from the mulberry tree. An end of the strip is wound round one limb of the fork, then the other end is passed under the nest and wound round the other limb of the supporting bough. If the strip be long enough it is again passed under the nest. This framework supports the nest proper, which is a hemispherical cup composed of fine roots and dried grass. The minimum of material is used in construction, with the result that the eggs lying in the nest are sometimes visible from below. He who would find orioles’ nests should repair in June to the canal bank or to the above-mentioned wood.
Every oriole’s nest that I have seen in Lahore has been placed near a king-crow’s nest. It is, I think, for the sake of protection that the oriole builds near the king-crow. This latter is so pugnacious that most predaceous birds avoid the tree in which its nest is situated.
Among the summer visitors to the Punjab is a dove known as Oenopopelia tranquebarica. Those who find this name rather a mouthful are at liberty to call the bird the red turtle-dove. This species is of interest on account of the large amount of sexual dimorphism which it displays. The head and neck of the cock are ashy grey, his upper back and wings are the peculiar red of a faded port-wine stain, the lower back is grey, the middle tail feathers are brown and the other ones white. There is a black collar round his neck. The hen is a uniform greyish brown, her only adornment being a black collar similar to that of the cock.
As a chapter of this work is devoted exclusively to the red turtle-dove, nothing more need be said of it in this place, save that its note is not the orthodox coo, it is a peculiar low grunt, and gives one the impression that the bird has caught cold.