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The scales on butterfly wings are pigmented with melanins that can produce the colours black and brown. The white colour in the butterfly family Pieridae is a derivative of uric acid, an excretory product. [13] [40]: 84 Bright blues, greens, reds, and iridescence are usually created not by pigments but through the microstructure of the scales.
The scissor-tailed flycatcher (Tyrannus forficatus), known as swallow-tailed flycatcher or scissorstail, is a long-tailed insectivorous bird of the genus Tyrannus, whose members are collectively referred to as kingbirds. Its scientific name used to be Muscivora forficata until it was changed to Tyrannus forficatus.
The triangular wings are white to greenish white with black longitudinal stripes. A pair of swordlike tails extend from the hindwings. [3] The inner margin of the hindwing has two blue spots on the corner and a red spot near the body. [3] A red stripe runs along the middle of the ventral hindwing.
The basic colour of the wings is black, with a chain of white spots on the forewing and a large white or yellow area on the hindwing. The underside and the upperside of the wings in this species are very similar. The hindwings have wavy margins, with long tails. The thorax and the abdomen are black. [2]
The Weidemeyer's admiral's wings are black and white on the dorsal side, with rows of white spots across the wings. On the ventral side, the black is replaced by brown with gray markings along the margins of the hindwing. The larvae feed on aspen and cottonwood (Populus), willows (Salix), oceanspray (Holodiscus), and shadbush (Amelanchier ...
The common crow is a glossy-black butterfly with brown undersides with white markings along the outer margins of both wings. The wingspan is about 8–9 cm and the body has prominent white spots. The male has a velvety black brand located near the rear edge on the upperside of the forewing.
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The common whitetail or long-tailed skimmer (Plathemis lydia) is a common dragonfly across much of North America, with a striking and unusual appearance.The male's chunky white body (about 5 cm or 2 inches long), combined with the brownish-black bands on its otherwise translucent wings, give it a checkered look.