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The black-and-white mannikin (Spermestes bicolor) also black-and-white munia or red-backed mannikin, is a species of estrildid finch, widely occurring throughout the African tropical rainforest. It has an estimated global extent of occurrence of 4,200,000 km 2. It is found in moist savanna and subtropical or tropical moist lowland forest habitat.
Female - Sandia Peak - New Mexico. The gray-crowned rosy finch was first classified by English ornithologist William Swainson in 1832. [1] This bird has been thought to form a superspecies with three other rosy finches (also known as mountain finch): black rosy finch (L. atrata) and the brown-capped rosy finch (L. australis), all of which were classified as the same species as the Asian rosy ...
The average European goldfinch is 12–13 cm (4.7–5.1 in) long with a wingspan of 21–25 cm (8.3–9.8 in) and a weight of 14 to 19 g (0.49 to 0.67 oz). The sexes are broadly similar, with a red face, black and white head, warm brown upper parts, white underparts with buff flanks and breast patches, and black and yellow wings.
The only finch in its subfamily to undergo a complete molt, the American goldfinch displays sexual dichromatism: the male is a vibrant yellow in the summer and an olive color during the winter, while the female is a dull yellow-brown shade which brightens only slightly during the summer.
The adults are colored black from the head to the throat and breast, and from the belly to undertail coverts and thighs. Between the breast and belly and on its flanks, it’s colored white. The upper part of the body is a warm chestnut. Flight feathers are dark brown and the underwing coverts are colored white to cream.
Even within the same species, color can vary by age, season and sex. Birds undergo molting, the process of shedding old feathers and growing new ones, which can result in color transformations ...
The basic plumage colour is brownish, sometimes greenish; many have considerable amounts of black, while white plumage is generally absent except as wing-bars or other signalling marks. Bright yellow and red carotenoid pigments are commonplace in this family, and thus blue structural colours are rather rare, as the yellow pigments turn the blue ...
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