Ladder capital dating spreadsheet
Most mammals are intelligent, with some possessing large brains, self-awareness and tool use.
Mammals can communicate and vocalize in several different ways, including the production of ultrasound, scent-marking, alarm signals, singing, and echolocation.
No classification system is universally accepted; Mc Kenna & Bell (1997) and Wilson & Reader (2005) provide useful recent compendiums.
George Gaylord Simpson's "Principles of Classification and a Classification of Mammals" (AMNH Bulletin v.
Mammal classification has been through several iterations since Carl Linnaeus initially defined the class.
Though field work gradually made Simpson's classification outdated, it remains the closest thing to an official classification of mammals.
The three largest orders in numbers of species are Rodentia: mice, rats, porcupines, beavers, capybaras and other gnawing mammals; Chiroptera: bats; and Soricomorpha: shrews, moles and solenodons.
Mammals include the largest animal on the planet, the blue whale.
The basic body type is a terrestrial quadruped, but some mammals are adapted for life at sea, in the air, in trees, underground or on two legs.
The early synapsid mammalian ancestors were sphenacodont pelycosaurs, a group that produced the non-mammalian Dimetrodon.