Animals
Articles about animal species, behavior and classification.
Mexican burrowing toad
Mexican west coast rattlesnake
Mexican West Coast Rattlesnake (Crotalus basiliscus)
Miacis
Microbiotheria
Microbiotheria: the Monito del Monte and its evolutionary significance
Microcaecilia supernumeraria
Microhylidae
Microhylidae — the narrow‑mouthed frog family
Micromoth
Micromoth (microlepidoptera): biology, identification, and ecological role
Micropachycephalosaurus
Micropachycephalosaurus — small ornithischian from the Late Cretaceous of China
Microraptor
Microraptor — a small four-winged feathered dinosaur
Microvenator
Microvenator — a small, fast Early Cretaceous theropod
Midwife toad
Midwife toad (Alytes)
Migration
Migration (animal movement across habitats)
Migratory locust
Migratory locust (Locusta migratoria) — overview, biology, and impact
Milkweed butterfly
Milkweed butterflies (Danainae): biology, behavior and ecological role
Millipede
Millipede: biology, diversity, behavior, and ecological role
Mimathyma ambica
Mimic octopus
Mimic octopus (Thaumoctopus mimicus): adaptive mimicry and natural history
Mink
Mink: semi-aquatic mustelids, biology, distribution and human interactions
Minke whale
Minnow
Minnow: small freshwater fish and their roles
Miss Beazley (dog)
Miss Beazley — Presidential Scottish Terrier (2004–2014)
Mixed-breed dog
Mixosaurus
Mixosaurus — a small, cosmopolitan Triassic ichthyosaur
Moa
Mockingbird
Moeritherium
Mole
Mole (Talpidae): biology, behaviour, and distribution
Mole cricket
Mole cricket (family Gryllotalpidae): burrowing crickets and their biology
Mole salamander
Mole salamander (Ambystoma)
Mollusc
Mollusc (Mollusca): diversity, anatomy, evolution and human relevance
Monal
Monal (Lophophorus): iridescent pheasants of the high Himalaya
Monarch butterfly
Monarch butterfly (Danaus plexippus): appearance, life cycle, and migration
Monard's dormouse
Monard's dormouse (Graphiurus monardi)
Mongoose
Monitor lizard
Monk parakeet
Monk parakeet (Quaker parrot): description, behavior, and human interactions
Monkey
Monkeys: biology, classification, behavior and human connections
Monoclonius
Monoclonius — a doubtful ceratopsid dinosaur genus
Monolophosaurus
Monolophosaurus — Middle Jurassic crested theropod from China
Monotreme
Monotremes: egg-laying mammals of Australia and New Guinea
Montanoceratops
Moor frog
Moor frog (Rana arvalis)
Moose
Moose (Alces alces): large northern deer
Moray eel
Moray eel (family Muraenidae)
Morpho
Morpho (butterfly genus)
Mosasaur
Mosquito
Mosquito (Culicidae): biology, life cycle, and human impact
Moth
Moth: biology, diversity, behavior and relationships with humans
Moths are diverse insects of the order Lepidoptera, closely related to butterflies. This article covers their characteristics, life cycle, diversity, ecological roles, human uses a