When monitoring the health of mammal populations, scientists often use camera traps to observe the animals in their habitats.

the least weasel (Mustela nivalis)—also called little weasel—is still the smallest true carnivore on Earth. It's native to Eurasia, North America, and North Africa, but has been introduced to ...

Weasels are often difficult to capture on camera, making it hard for conservationists to track their population numbers. This ...

Longtail weasels in more southerly regions don’t turn white in winter, and the ones in the transition zone turn only ...

Nimble, elegant and lithe, the common weasel is this country’s, and the world's, smallest carnivore. The male of the species is usually around 11 inches long, but so streamlined that it can squeeze ...

The long-tailed weasel is carnivorous and its diet is similar to the ermine’s, but includes a greater portion of larger prey which is taken primarily by males. Small rodents such as mice and voles are ...