A mammal (from Latin mamma 'breast') is a vertebrate animal of the class Mammalia (/məˈmeɪli.ə/). Mammals are characterized by the presence of milk-producing...

Mammalia is a class of animal within the phylum Chordata. Mammal classification has been through several iterations since Carl Linnaeus initially defined...

Marine mammals are mammals that rely on marine (saltwater) ecosystems for their existence. They include animals such as cetaceans (whales, dolphins and...

regular basis in uninseminated sexually reproductive-age females of certain mammal species. Although there is some disagreement in definitions between sources...

Venomous mammals are animals of the class Mammalia that produce venom, which they use to kill or disable prey, to defend themselves from predators or...

A state mammal is the official mammal of a U.S. state as designated by a state's legislature. The first column of the table is for those denoted as the...

Placental mammals (infraclass Placentalia /plæsənˈteɪliə/) are one of the three extant subdivisions of the class Mammalia, the other two being Monotremata...

The evolution of mammals has passed through many stages since the first appearance of their synapsid ancestors in the Pennsylvanian sub-period of the...

clade Euungulata ("true ungulates"), which primarily consists of large mammals with hooves. Once part of the clade "Ungulata" along with the clade Paenungulata...

inter-sexual competition. Unlike more social species bears, being solitary mammals, have wide-ranging habitats to locate potential mates. Due to the asynchrony...

called Pan-Placentalia, is the clade consisting of placental mammals and all therian mammals that are more closely related to placentals than to marsupials...

Monotremes (/ˈmɒnətriːmz/) are mammals of the order Monotremata. They are the only known group of living mammals that lay eggs, rather than bearing live...

Bats are flying mammals of the order Chiroptera (/kaɪˈrɒptərə/). With their forelimbs adapted as wings, they are the only mammals capable of true and...

Small mammals or micromammals are a subdivision of mammals based on their body mass and size. Different values have been used as the upper limit. The International...

early Mesozoic, but the only group that survived into the Cenozoic are mammals. Unlike other amniotes, synapsids have a single temporal fenestra, an opening...

continued to the present day. All therapsid groups with the exception of the mammals are now extinct, but each of these groups possessed different tooth patterns...

beast') is a subclass of mammals amongst the Theriiformes. Theria includes the eutherians (including the placental mammals) and the metatherians (including...

The Mammal Paleogene zones or MP zones are a system of biostratigraphic zones in the stratigraphic record used to correlate mammal-bearing fossil localities...

Mammal is a 2016 internationally co-produced drama film directed by Rebecca Daly, who co-wrote the screenplay with Glenn Montgomery. Starring Rachel Griffiths...

semiaquatic mammals are a diverse group of mammals that dwell partly or entirely in bodies of water. They include the various marine mammals who dwell in...

Mammal Review is a zoology journal published by Wiley-Blackwell on behalf of The Mammal Society. Covering all areas of mammalian biology, ecology, physiology...

highly variable between mammals of different species. In many mammals, the penis is retracted into a prepuce when not erect. Mammals have either musculocavernous...

Jr. (1903). Seventy New Malayan Mammals. Smithsonian Miscellaneous Collections 45: 1–73. Lyon Jr, M. W. (1906). "Mammals of Banka, Mendanau, and Billiton...

(2005). "Infraorder Hystricognathi". In Wilson, D.E.; Reeder, D.M (eds.). Mammal Species of the World: A Taxonomic and Geographic Reference (3rd ed.). Johns...

Lists of mammals by region cover mammals found in different parts of the world. They are organized by continent, region, and country, and in some places...

also the oldest fossil hominoid known until recently, and the first fossil mammal ever found in sub-Saharan Africa. The name, Proconsul, was devised by Arthur...

The following is a list of largest mammals by family. The largest of these insectivorous mammals is the giant otter shrew (Potamogale velox), native to...

was founded in 1919. Its primary purpose is to encourage the study of mammals, and professions studying them. There are over 4,500 members of this society...

based on either sex chromosomes, or environmental conditions. Most female mammals, including female humans, have two X chromosomes. Characteristics of organisms...

A dolphin is an aquatic mammal in the clade Odontoceti (toothed whale). Dolphins belong to the families Delphinidae (the oceanic dolphins), Platanistidae...