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Updated: May 25, 2025
Drill, sexual difference of colour in the. Dromaeus irroratus. Dromolaea, Saharan species of. Drongo shrike. Drongos, racket-shaped feathers in the tails of. Dryness of climate, supposed influence of, on the colour of the skin. Dryopithecus. Duck, harlequin, age of mature plumage in the; breeding in immature plumage. Duck, long-tailed, preference of male, for certain females.
Tristram, some curious exceptions to the rule; thus the male of the Monticola cyanea is conspicuous from his bright blue colour, and the female almost equally conspicuous from her mottled brown and white plumage; both sexes of two species of Dromolaea are of a lustrous black; so that these three species are far from receiving protection from their colours, yet they are able to survive, for they have acquired the habit of taking refuge from danger in holes or crevices in the rocks.
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