Animals

Marsupial

Marsupials

Marsupial lion

Marsupial lion (Thylacoleo): extinct Australian carnivorous marsupial

Marsupial mole

Marsupial mole (Notoryctidae)

Marten

Marten (genus Martes) — small mustelids of the Northern Hemisphere

Martial eagle

Martial eagle (Polemaetus bellicosus)

Maru (cat)

Maru (cat) — Japanese internet celebrity cat

Masiakasaurus

Masiakasaurus: a small predatory dinosaur from Late Cretaceous Madagascar

Masked mouse-tailed dormouse

Masked mouse-tailed dormouse (Myomimus personatus)

Massospondylus

Mastiff

Mastodon

Mastodons (Mammutidae): extinct proboscidean browsers related to elephants

Materpiscis

Materpiscis: Devonian pyctodontid placoderm preserving an embryo

Mauisaurus

Mauisaurus: the New Zealand long‑necked plesiosaur

Maxillopoda

Meadow brown

Meadow brown (Maniola jurtina) — common European grassland butterfly

Meat ant

Meat ant (Iridomyrmex purpureus)

Meerkat

Megabat

Megabat (Old World fruit bat)

Megafauna

Megafauna: Large Animals of the Ice Ages and the Modern World

Megalania

Megalania: the giant Pleistocene monitor of Australia

Megalibgwilia

Megalodon

Megaloptera

Megaloptera: alderflies, dobsonflies, and fishflies

Megalosauridae

Megalosauridae — a family of Jurassic carnivorous theropods

Megalosauroidea

Megalosauroidea — overview of the megalosauroid theropods

Megalosaurus

Megamouth shark

Meganisoptera

Megapode

Megaraptor

Megatherium

Megazostrodon

Megazostrodon: early mammaliaform from southern Africa

Megophryidae

Megophryidae — Asian leaf-litter and horned frogs

Mekong giant catfish

Melanophryniscus

Melon-headed whale

Melon-headed whale (Peponocephala electra)

Meow

Meow: the cat vocalization used to communicate with humans and other cats

Meowth

Meowth (Pokémon): the Scratch Cat

Merginae

Merginae (seaducks)

Merostomata

Merostomata: sea scorpions (Eurypterida) and horseshoe crabs (Xiphosura)

Mertensophryne

Mertensophryne — snouted frogs, an African genus of true toads

Mesobatrachia

Mesobatrachia: the intermediate clade of frogs

Mesonychid

Mesonychids: extinct hoofed carnivorous mammals

Mesosaurus

Mesosaurus — an early aquatic reptile of the Permian

Metatheria

Metatheria: marsupials and their extinct relatives

Metriacanthosauridae

Metriacanthosaurus

Metriacanthosaurus: a Middle Jurassic theropod of Europe

Mew