List of mammals of New York

Opossums probably diverged from the basic South American marsupials in the late Cretaceous or early Paleocene.

They differ from rodents in a number of physical characteristics, such as having four incisors in the upper jaw rather than two.Rodents make up the largest order of mammals, with over 40% of mammalian species.

They have two incisors in the upper and lower jaw which grow continually, and must be kept short by gnawing.

The bats' most distinguishing feature is that their forelimbs are developed as wings, making them the only mammals capable of flight.

Cetaceans are the mammals most fully adapted to aquatic life with a spindle-shaped nearly hairless body, protected by a thick layer of blubber, and forelimbs and tail modified to provide propulsion underwater.