Whale is the common name for a widely distributed and diverse group of fully aquatic placental marine mammals. They are an informal grouping within the infraorder Cetacea, usually excluding dolphins and porpoises. Whales, dolphins and porpoises belong to the order Cetartiodactyla with even-toed ungulates and their closest living relatives are the hippopotamuses, having diverged about 40 million years ago. The two parvorders of whales, baleen whales (Mysticeti) and toothed whales (Odontoceti), are thought to have split apart around 34 million years ago. The whales comprise eight extant families: Balaenopteridae (the rorquals), Balaenidae (right whales), Cetotheriidae (the pygmy right whale),
Bison or buffalo are large, even-toed ungulates in the genus Bison within the subfamily Bovinae
Two extant and four extinct species are recognized. Of the four extinct species, three were North American: Bison antiquus, B. latifrons, and B. occidentalis. The fourth, B. priscus, ranged across steppe environments from Western Europe, through Central Asia, East Asia including Japan,and onto North America.
The American bison and the European bison (wisent) are the largest terrestrial animals in North America and Europe. Bison are good swimmers and can cross rivers over half a mile (800 meters) wide. They are nomadic grazers and travel in herds. The bulls leave the herds of females at
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Chipmunks are small squirrel-like rodents that are native to North America, although one species is found in some European countries.
Chipmunks eat a wide variety of wildlife like frogs, mushrooms, birds, eggs, plants nuts and seeds. In the autumn, the chipmunks begin to gather their winter food stash, which they store in their burrows to last them until spring.
The most common chipmunks are the red coloured chipmunks with light brown stripes on their back. These are North American chipmunks. Chipmunks are also becoming more popular as pets.
There are 25 different species of chipmunk living in the North American forests. The chipmunk is often referred to as a small squirrel
