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A feral cat with an American Robin.Plate from Forbush (1916). Outdoor cats are the largest human cause of bird mortality. A 2013 study by Scott R. Loss and others of the Smithsonian Conservation Biology Institute and the U.S. Fish and Wildlife Service found that free-ranging domestic cats are likely the top human-caused threat to birds and small mammals in the United States, killing an ...
A crab-eating macaque using a stone. Tool use by non-humans is a phenomenon in which a non-human animal uses any kind of tool in order to achieve a goal such as acquiring food and water, grooming, combat, defence, communication, recreation or construction. Originally thought to be a skill possessed only by humans, some tool use requires a ...
The fish faces into the current, waiting for prey to drift by. [34] [35] [36] Several species of Felidae (cats) and snakes have vertically elongated (slit) pupils, advantageous for nocturnal ambush predators as it helps them to estimate the distance to prey in dim light; diurnal and pursuit predators in contrast have round pupils. [30]
Indeed, in times of food shortage, storm disruptions or changing seasons which result in lower fruit yield (i.e. winter and autumn), the birds turn from primary consumer to generalist opportunistic predators, as frequent fecal examinations revealed the skeletal remains of entire birds, rodents and fish scales on a constant basis.
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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 ...
Beak trimming (also spelled as beak-trimming; informally as debeaking), or beak conditioning, is the partial removal of the beak of poultry, especially layer hens and turkeys, although it is also be performed on some quail and ducks. When multiple birds are confined in small spaces due to farming practices, they are more likely to hurt each ...
Fish intelligence. Fish intelligence is "the resultant of the process of acquiring, storing in memory, retrieving, combining, comparing, and using in new contexts information and conceptual skills" [1] as it applies to fish. Due to a common perception amongst researchers that Teleost fish are "primitive" compared to mammals and birds, there has ...
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