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It was introduced by the French zoologist Jules-César Savigny in 1809 with the black-winged kite (Elanus caeruleus) as the type species. [2] [3] The name is from the Ancient Greek elanos for a "kite". [4] These are white and grey raptors of open country, with black wing markings and a short square tail.
The gray-headed kite is 46–53 cm in length and weighs 410-605 g. The adult has a grey head, black upperparts, white underparts, and a black tail with two or three white bars. The bill is blue and the legs grey. The flight is a deliberate flap-flap-glide.
Grey-headed kite is a widespread species, breeding from eastern Mexico and Trinidad south to Peru, Bolivia and northern Argentina. However, white-collared kite is restricted to northeastern Brazil , and is classified as Critically Endangered.
In computing terminology, black-and-white is sometimes used to refer to a binary image consisting solely of pure black pixels and pure white ones; what would normally be called a black-and-white image, that is, an image containing shades of gray, is referred to in this context as grayscale. [2]
Measuring around 35 cm (14 in) in length, with a wingspan of 80–100 cm (31–39 in), the adult black-shouldered kite has predominantly grey-white plumage and prominent black markings above its red eyes. It gains its name from the black patches on its wings. The primary call is a clear whistle, uttered in flight and while hovering.
While it has white faces and white underparts, it has black wingtips, beaks, and shoulders. Contrastingly, the white-tailed kite has deep red eyes that stand out at night. [ 6 ] A mid-sized kite, it measures 35–43 cm (14–17 in) in length, spans 88–102 cm (35–40 in) across the wings and weighs 250–380 g (8.8–13.4 oz).
[3] [5] There is also a pale white patch on the ventral surface of the wings, at the base of the primary feathers; [2] [3] [5] the saddle, rump and central upper tail-coverts are blackish, while the upper tail-coverts are grey-brown and fade into a small pale patch above the tail. [3] The tail itself is square with dark sub-terminal band.
These animations were probably made in black-and-white. The pictures were often traced from live-action films (much like the later rotoscoping technique). [100] [101] 1899 – French trick film pioneer Georges Méliès claimed to have invented the stop trick and popularized it by using it in many of his short films.