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Total physical response (TPR) is a language teaching method developed by James Asher, a professor emeritus of psychology at San José State University. It is based on the coordination of language and physical movement. In TPR, instructors give commands to students in the target language with body movements, and students respond with whole-body ...
A drawing by Konrad Lorenz showing facial expressions of a dog - a communication behavior. X-axis is aggression, y-axis is fear. Dog behavior is the internally coordinated responses of individuals or groups of domestic dogs to internal and external stimuli. [1] It has been shaped by millennia of contact with humans and their lifestyles.
Dogs have made 11 vertebrate species extinct and are identified as a 'potential threat' to at least 188 threatened species worldwide; [162] another figure is that dogs have also been linked to the extinction of 156 animal species. [163] Dogs have been documented to have killed a few birds of the endangered species, the kagu, in New Caledonia. [164]
Caniformia is a suborder within the order Carnivora consisting of "dog-like" carnivorans. They include dogs (wolves, foxes, etc.), bears, raccoons, and mustelids. [1] The Pinnipedia (seals, walruses and sea lions) are also assigned to this group. The center of diversification for the Caniformia is North America and northern Eurasia.
Dogs have ear mobility that allows them to rapidly pinpoint the exact location of a sound. Eighteen or more muscles can tilt, rotate, raise, or lower a dog's ear. A dog can identify a sound's location much faster than a human can, as well as hear sounds at four times the distance. [41] Dogs can lose their hearing from age or an ear infection. [42]
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This word refers to a large, dark-brown animal that lives in (or around) African rivers. They are renowned for their barrel-shaped bodies, enormous heads and short legs.
A study of the estimated bite force at the canine teeth of a large sample of living and fossil mammalian predators, when adjusted for their body mass, found that for placental mammals the bite force at the canines (in Newtons/kilogram of body weight) was greatest in the extinct dire wolf (163), followed among the modern canids by the four ...