Familiar Studies of Wild Birds F. N. Whitman

"The real haven of the naturalist is out in the fields and woods of the country. But for those city people, who do not find the country within their immediate reach, the city park offers a great deal more than may be thought, in the way of material for nature study. On an early spring morning, the parks of many of our large cities literally swarm with migrating birds. A wide range of species, to a hundred, or even more, may be counted on a single morning, if one rises early and is sharp-sighted. The observer must also have a fair knowledge of the commoner species of birds, or identify them by means of field glasses and guide book. " Это и многое другое вы найдете в книге Familiar Studies of Wild Birds (F. N. Whitman)