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Gibbons are apes native to southern Asia.
Blood vessels in fishes' gills absorb oxygen and release carbon dioxide.
One of the most common types of Anatidae, the ancestor of the domestic duck.
A type of large freshwater crayfish widespread in Europe.
One of the best known species of spiders, often kept as pets. Its bite is not fatal for...
Eupteryds are an extinct group of Paleozoic aquatic arthropods.
A typical animal of the Andes kept as a beast of burden as well as for its meat and wool.
Marsh harriers are birds of prey found almost worldwide.