Analysis of 175 stomaches contents in four species of Alaudidae and three species of Motacillidae made it possible to establish that in their food there is a great number of insects-pests. As most birds of the studied ...

The comparison of the relative dimensions of bills and jaws of two similar species of larks Melanocorypha leucoptera and M. mongolica shows that as to the jaw apparatus the white-winged lark is less specialized and closer ...