Mammals are found in all types of environments. A mammalogist can research everything from genetic and cellular level interactions to ethology and ecology of an animal species or community.
Mammals are favourites for studies on learning and communication, particularly in cetaceans, proboscidea and primates. The unique aspects of monotremes and marsupials makes them particularly interesting to those that are looking at the evolution of mammals and how the breakup of Pangaea affected evolution.
Monotremes are believed to have split from the main line of mammals approximately 190 million years ago and marsupials are believed to have split off about 100 millions years ago.
Many mammals are considered endangered; particularly rhinos, some primates, and many of the big cats. Habitat destruction and poaching have had a profound impact on many species rich environments.
Because many mammals are K selected species, they cannot replenish their population very quickly. There is also a loss of genetic diversity after a species reaches a certain number of individuals that makes it very vulnerable to disease.
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