Mammals metabolize ammonia into a molecule called urea: As you can see, this molecule contains two atoms of nitrogen. Although it requires metabolic energy to build, it also is less toxic than ammonia, and it requires less water to flush from the system.Your urine's main nitrogenous waste product is urea.ammals metabolize ammonia into a molecule called urea: As you can see, this molecule contains two atoms of nitrogen. Although it requires metabolic energy to build, it also is less toxic than ammonia, and it requires less water to flush from the system.
Tree squirrels are squirrels that live in trees and ground squirrels, like chipmunks and prairie dogs, are squirrels that live in the ground. As a general rule, tree squirrels have longer life spans than ground squirrels.1.
Typical Lifespan: Flying squirrels can live up to 10 years in captivity, or about half that in the wild. Habitat: Flying squirrels live in deciduous and coniferous forests and woodlands. They make their homes in snags, woodpecker holes, nest boxes, and abandoned nests of birds and other squirrels. Sometimes multiple squirrels will nest together to keep warm in the winter.