Flattail

Beavers are native to North America and Eurasia, and can be found in a variety of environments, such as rivers, lakes, ponds, marshes, and swamps.

They are herbivorous and feed mainly on the bark, leaves, and twigs of trees.

Beavers are social animals that live in colonies usually consisting of a breeding pair and their offspring.

Beavers use their powerful teeth and claws to cut down trees and branches, which they transport to the water and use to construct dams and lodges.

Dams are barriers that slow down the flow of water and create ponds, while lodges are dome-shaped structures that serve as shelters and nesting sites for beavers.

Beavers also dig canals to access food sources and escape predators.

The Flattail can refer to different animals, but I assume you mean the Flattail mullet, a type of fish.
The Flattail mullet is an Australian fish that belongs to the family Mugilidae.
It has a silver body with a bluish-green back and a yellowish belly.
It has a small mouth and two dorsal fins.
Its tail is flat and forked, giving it its name.
It can grow up to 40 cm long and weigh up to 1 kg.
It is an important food fish for humans and other animals.
It lives in coastal waters, estuaries and rivers, where it feeds on algae, detritus and plankton.
It can tolerate a wide range of salinity and temperature.
It spawns in the sea during summer and autumn.