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The origin of the English word cat (Old English catt) and its counterparts in other Germanic languages (such as German Katze), descended from Proto-Germanic *kattōn-, is controversial.
It has traditionally thought to be a borrowing from Late Latin cattus "domestic cat", from catta (used around 75 AD by Martial), The Late Latin word is generally thought to originate from an Afro-Asiatic language, but every proposed source word has presented problems.
Cats can hear sounds too faint or too high in frequency for human ears, such as those made by mice and other small animals. Like most other mammals, cats have poorer color vision and a better sense of smell than humans.
Cats, despite being solitary hunters, are a social species and cat communication includes the use of a variety of vocalizations (mewing, purring, trilling, hissing, growling, and grunting), as well as cat pheromones and types of cat-specific body language.
Cats are thought to be primarily responsible for the extinction of 33 species of birds, and the presence of feral and free-ranging cats makes some otherwise suitable locations unsuitable for attempted species reintroduction. In comparison to dogs, cats have not undergone major changes during the domestication process, as the form and behavior of the domestic cat is not radically different from those of wildcats and domestic cats are perfectly capable of surviving in the wild.