Learn - 'mammals'
Mammals (class Mammalia) are warm-blooded, vertebrate animals characterized by the presence of sweat glands, including those that produce milk, and by the presence of: hair, three middle ear bones used in hearing, and a neocortex region in the brain. Most mammals also possess specialized teeth and utilize a placenta in the ontogeny. The mammalian brain regulates endothermic and circulatory systems, including a four-chambered heart. Mammals encompass approximately 5,400 species (including humans), distributed in about 1,200 genera, 153 families, and 29 orders, though this varies by classification scheme.
House cat, small domestic mammal.
Wolf is wild animal.
Rat typicaly lives from 2 to five years.
This is horse.
Bear is wild animal.
This animal is called hamster.
This animal is called dog, also domestic dog.
This is mouse in typical coloration.