When they are ready to reproduce, they travel back upriver to the streams where they were born to spawn and die. B. Amphibians Amphibians young hatch from eggs laid in the water. The young have gills and feed on underwater plants until they metamorphose and turn into land-dwelling forms. Some species of shrews are the world's smallest mammals. They can be less than two inches long.
Shrews are insectivores.
They are nocturnal and live on the ground. They are related to moles. B. Canids Canids are members of the dog family. Foxes, coyotes and wolves are all carnivorous hunters. They prey on a variety of mammals and birds.