Birds and Nature, Vol. VIII, No. 4, November 1900. Various
about thirty-six species that frequent North America. Closely related to the loons, the Grebes differ from them in having the head incompletely feathered near the nostrils, which are not lobed. The feet also are not completely webbed, as are those of the loons.
Owing to the inadequately developed wings, the Grebes are poorly provided with means for protracted flight. Locomotion on land is equally difficult, due to their short legs and the fact that they are inserted far back on the body, necessitating a partially erect position in walking. However, they are expert swimmers and divers and will, when alarmed, sink quietly back into the water, swimming long distances with only the bill above the surface of the water. The popular name "Hell-diver," by which these birds are frequently known, has reference to the rapidity with which they dive.
The apparent lack of a tail and the ruffs, frequently composed of variously colored feathers, give the grebes a peculiarly characteristic appearance. The plumage of the breeding season differs greatly from that of the adult in winter and that of the young.
Конец ознакомительного фрагмента.
Текст предоставлен ООО «ЛитРес».
Прочитайте эту книгу целиком, купив полную легальную версию на ЛитРес.
Безопасно оплатить книгу можно банковской картой Visa, MasterCard, Maestro, со счета мобильного телефона, с платежного терминала, в салоне МТС или Связной, через PayPal, WebMoney, Яндекс.Деньги, QIWI Кошелек, бонусными картами или другим удобным Вам способом.