American Pika (Ochotona princeps): indigenous to the US and other mountainous areas of western North America.
Least Weasel (Mustela nivalis): The world's tiniest carnivorous mammal, the least weasel inhabits a variety of US habitats, including grasslands.
Pygmy Shrew (Sorex hoyi): One of the smallest animals in North America, including the US, is the pygmy shrew.
Southern Bog Lemming: A tiny, fossorial rodent, the southern bog lemming is found in the northeast and central regions of the United States.
Kangaroo Rat (Dipodomys spp.): Small rodents called kangaroo rats live in dry areas of the western United States.
Deer Mouse (Peromyscus maniculatus): In the United States, deer mice are a common rodent that can be found in urban areas, grasslands, and woodlands.
American Mink (Neovison vison): Across the US, wetland areas are home to the little carnivorous mammal known as the American mink.
Western Harvest Bat (Eptesicus fuscus): One of the biggest bat species in North America is the western harvest bat, sometimes referred to as the huge brown bat.
American Goldfinch: With a length and weight of approximately 4 to 5 inches, the American goldfinch is among the smallest songbirds found in North America.
Western Harvest Mouse (Reithrodontomys megalotis): The western harvest, found in many settings throughout the western United States.