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Male in California, U.S. The violet-green swallow gets its name from the colouration on its back and rump. The species is best identified by the glossy green on the top of the head and back as well as hints of purple on the nape, rump and upper tail. Below the green back, the remainder of the wing is a grayish-bronze.
6 species recorded [5 extant native, 1 vagrant] The family Corvidae includes crows, ravens, jays, choughs, magpies, treepies, nutcrackers and ground jays. Corvids are above average in size among the Passeriformes, and some of the larger species show high levels of intelligence. Common name. Binomial.
The Mexican violetear is roughly medium-sized by hummingbird standards. It averages around 9.7 to 12 cm (3.8 to 4.7 in) in total length. Its bill is black and mostly straight with only a slight downward curve and measures from 1.8 to 2.5 cm (0.71 to 0.98 in). [3] The body mass can vary from 4.8 to 5.6 g (0.17 to 0.20 oz).
Birds with eyes on the sides of their heads have a wide field of view, useful for detecting predators, while those with eyes on the front of their heads, such as owls, have binocular vision and can estimate distances when hunting. [9] [10] The American woodcock probably has the largest field of view of any bird, 360° in the horizontal plane ...
Description. The violet-backed starling is a sexually dimorphic species with adults reaching a length of about 18 cm (7 in). The male has an iridescent violet head and back and pure white underparts. The female has a thrush-like appearance with brown, boldly-streaked upper parts and white, heavily-streaked underparts.
The varied thrush is a fairly large thrush species. It can range from 20 to 26 cm (7.9 to 10.2 in) in length and can span 34 to 42 cm (13 to 17 in) across the wings. Body mass can vary from 65 to 100 g (2.3 to 3.5 oz).
A common phenotype of UV coloration is the “bulls-eye” pattern where a flower reflects UV light at the ends of the petals and absorbs UV light in the center. [4] This acts as a guide for pollinators to locate and find pollen. [4] Other flowers add the contrast between their reproductive parts ( anthers and pistils) and their petals. [7]
Accipitridae is a family of birds of prey which includes hawks, eagles, kites, harriers, and Old World vultures. These birds have powerful hooked beaks for tearing flesh from their prey, strong legs, powerful talons, and keen eyesight. Black-winged kite, Elanus caeruleus. Scissor-tailed kite, Chelictinia riocourii.