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Crows in a trap on a farm in England. Almost all traps involve the use of food, water or decoys to attract birds within range and a mechanism for restricting the movement, injuring or killing birds that come into range. Food, water, decoy birds and call playback may be used to bring birds to the trap. The use of chemical sprays on crops or food ...
Cranes are a type of large bird with long legs and necks in the biological family Gruidae of the order Gruiformes. The family has 15 species placed in four genera which are Antigone, Balearica, Leucogeranus, and Grus. [1] They are large birds with long necks and legs, a tapering form, and long secondary feathers on the wing that project over ...
The snowy owl (Bubo scandiacus), [4] also known as the polar owl, the white owl and the Arctic owl, [5] is a large, white owl of the true owl family. [6] Snowy owls are native to the Arctic regions of both North America and the Palearctic, breeding mostly on the tundra. [2] It has a number of unique adaptations to its habitat and lifestyle ...
A challenge for any diving bird is the change in refraction between air and water. The eyes of many birds have two foveae (the fovea is the area of the retina with the greatest density of light receptors), [22] and a kingfisher can switch from the main central fovea to the auxiliary fovea when it enters water; a retinal streak of high receptor ...
Jan. 8—Alaskans find ways to keep warm in the darkest days of winter: puffy coats, bunny boots, flights to Arizona. But how do the birds of the only Arctic state stay cozy when the mercury dips ...
Chukar Patridge from United Arab Emirates. The chukar partridge (Alectoris chukar), or simply chukar, is a Palearctic upland gamebird in the pheasant family Phasianidae.It has been considered to form a superspecies complex along with the rock partridge, Philby's partridge and Przevalski's partridge and treated in the past as conspecific particularly with the first.
Bird migration. Bird migration is a seasonal movement of birds between breeding and wintering grounds that occurs twice a year. It is typically from north to south or from south to north. Migration is inherently risky, due to predation and mortality. The Arctic tern holds the long-distance migration record for birds, travelling between Arctic ...
NASA map of the Agulhas Current showing the levels of primary production during 2009. This is a measure of how much food was available for the spawning sardines. The KwaZulu-Natal sardine run of southern Africa occurs from May through July when billions of sardines, or more specifically the Southern African pilchard, Sardinops sagax ocellatus, spawn in the cool waters of the Agulhas Bank and ...