The North American squirrel is an oft-seen but under-recognized staple of North America. They operate on a low-key level but ...

Aim To evaluate the relationship of climate and physiography to species density and ecological diversity of North American mammals. Location North America, including Mexico and Central America.

Journal of Biogeography, Vol. 32, No. 6 (Jun., 2005), pp. 961-971 (11 pages) Aim To assess the relationship between species richness and distribution within regions arranged along a latitudinal ...

North America used to be crawling with giant mammals, from dire wolves to big cats. Horses and camels evolved on the continent while others, like bison, crossed over from Asia. Most of these mammals ...

Two fossil teeth from a distant relative of North American gophers have scientists rethinking how some mammals reached the Caribbean Islands. Two fossil teeth from a distant relative of North American ...

A debate rages over the culling of barred owls to save northern spotted owls, one that eludes easy classification.

When the first modern humans ventured beyond Africa during the late Pleistocene, roughly 120,000 years ago, they stepped into a world filled with giants: the six-ton giant ground sloth in South ...

North American mammals were the winners when the North and South American continents collided millions of years ago. New research shows that South American mammals went extinct at a disproportionately ...

South America is filled with mammals from North America, but why more didn’t survive the reverse trip has been a natural history mystery. By Asher Elbein Millions of years before humans set foot in ...