Назарчук, Г.К.; Кистямовсхий, А.Б.; Смогоржевский, Л.А.; Шульман, Л.М.
(Вестник зоологии, 1969)
The article deals with the birds orientation as to the Sun. The variant, which is the easiest for birds to orient themselves, is chosen out of the infinite number of possible variants. This is the method to determine the ...