Page:Cassell's book of birds (IA cassellsbookofbi04breh).pdf/225

 without effort perform a variety of pleasing evolutions during their flight. In some of the Swiss cantons, and in all parts of Southern Europe lying near the sea, they are treated by the inhabitants as if half domesticated. They may be seen everywhere, running about with the greatest confidence, as if they knew very well that no one would attempt to do them an injury. Their voice is harsh and disagreeable, earning for them doubtless the name of Sea Crows, whereby they are generally designated. Towards the end of April the breeding season commences, and after much quarrelling the place selected where each pair is to build its nest. These birds never breed separately, seldom in small parties, but most generally in large flocks, of hundreds or rather thousands of birds, which generally crowd themselves together into a very limited space. Their nests are usually placed upon insulated patches of ground surrounded by water, or situated in the centre of a marsh, and overgrown with sedges, reeds, and rushes; under some circumstances they will build in the marsh itself, sheltering their nests among tufts of grass, but always in some unfrequented situation, to which access is nearly impracticable. The foundation of the nest is laid by flattening down the herbage and lining the cavity so formed with leaves, straw, and similar materials. The eggs, which are deposited about the beginning of May, to the number of four or five in each nest, are tolerably large, of a pale olive-green colour, speckled, spotted, and streaked with ashy-grey and dark brownish grey, but the eggs vary considerably both in size, colour, and markings. The two sexes brood alternately, one or other of them remaining constantly upon the nest during the night, but in the day-time they seem to think the heat of the sun an efficient substitute for their presence. After the lapse of about eighteen days the young make their appearance, and in about three or four weeks afterwards are completely fledged. In situations where the nests are surrounded by water the young ones do not leave them during the first few days, but if they are situated upon dry ground the little nestlings scramble out and run about very actively. When a fortnight old they are able to flutter from place to place, and at the end of the third week are almost able to take care of themselves. The courage with which the parents defend their young is most exemplary. No sooner does an enemy in the shape of a Hawk, a Crow, or a Heron make its appearance, than a tremendous outcry is raised by the whole colony, even the brooding birds leave their nests, and all rush forward to oppose the invader. A dog or fox they attack with equal fury. Should a man intrude upon them they fly around him in circles, screaming with all their might, and if, deafened by the noise, he retires, he is followed to some distance, with every indication of joy at his departure.

In the north of Germany it is common on a certain day to have a general battue, and slaughter the poor Gulls by wholesale. This useless destruction, which, under the name of "the Gull-shooting," serves as an excuse for a general holiday, savours much of the barbarism of the Dark Ages; as, far from being pernicious, these beautiful birds render important services to the farmers by clearing the land of a vast quantity of hurtful insects.

THE GREAT BLACK-HEADED GULL.

The (Chroicocephalus ichthyaëtus) in its summer plumage has the entire head and upper neck black, the feathered orbits white, back and wing blue-grey, upper tail-covers and tail pure white, with a black band, primaries with a black band, increasing in width to the outermost one, which has the whole of the web black, the rest of the first five primaries white, the others grey, tipped with white; the other parts of the plumage are pure white; bill red, yellow at tip; irides brown; feet dull red; length about twenty-six inches; wing nineteen to twenty inches; tail seven inches; bill at front two inches and a quarter; tarsus three inches; the closed wing extends about one inch and a half beyond the tail. This bird inhabits Northern and Central Asia, and is rare in India. Jerdon observed it on the sea-coast at Madras, and occasionally ascending the Hooghly and other