The colours of animals : their meaning and use, especially considered in the case of insects (1890)
Poulton, Edward Bagnall, Sir, 1856-1943 · New York : D. Appleton · leaf 133
VAKIABLE EESEMELANCE IN VEETEBRATA, ETC. 105 that other changes of colour do occur, as will be seen in the following passage from his most interesting paper.^ * Let any one who doubts the possibility of mark- ings such as those on the Greenland Falcon becoming gradually changed without an… … Pig. 18. Fig. 19 striped plumage when young and a barred dress when old. But it is not generally known that this is effected by a gradual change in the markings of the feather, and not by an actual moult. On the first appearance of the feathers from the downy covering of the nestling, the markings…
Animals · Insects
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