Among Adirondack mammals, pygmy shrews hold several records. Some adults weigh only 2-3 g (0.11 oz) and thus are the smallest mammals in the world. This species is also one of the rarest, with only ...

Classified as critically endangered and believed to have a rapidly declining population and habitat area, pygmy three-toed sloths (Bradypus pygmaeus) are native exclusively to the island of Escudo de ...

Cactus ferruginous pygmy owls are named for the saguaro cactuses they live in, their rusty-colored stripes, and their small size. They’re as fierce as they are small: These 2.5-ounce raptors prey on ...

The spring pygmy sunfish has been teetering on the brink of extinction for the 70-plus years it's been known to science. Existing only in one spring complex in the Tennessee River watershed in Alabama ...