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Animals That Start With “M”

Browse 14 verified species whose common names begin with the letter M.

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Mandrill

Mandrill

Mandrillus sphinx

Diet: Omnivore with fruit as a major component
Wild lifespan: Wild longevity is poorly documented; managed individuals can live 30–40 years

Maned Wolf

Maned Wolf

Chrysocyon brachyurus

Diet: Omnivore
Wild lifespan: Wild lifespan uncertain; up to roughly 12–15 years in managed care

Marine Iguana

Marine Iguana

Amblyrhynchus cristatus

Diet: Herbivore specialized on marine algae
Wild lifespan: Often estimated at five to twelve years, with some individuals living longer

Markhor

Markhor

Capra falconeri

Diet: Herbivore and ruminant
Wild lifespan: Commonly about 11–13 years in the wild

Mata Mata

Mata Mata

Chelus fimbriata

Diet: Aquatic carnivore and suction-feeding specialist
Wild lifespan: Wild lifespan is poorly known; managed animals can live for decades, and older 15-year figures are minimum records rather than a firm maximum

Meerkat

Meerkat

Suricata suricatta

Diet: Omnivore dominated by animal prey
Wild lifespan: Often five to ten years in the wild; around ten years in managed care

Mexican Alligator Lizard

Mexican Alligator Lizard

Abronia graminea

Diet: Arboreal predator of invertebrates and small animals
Wild lifespan: Wild longevity is poorly known; managed individuals may live more than a decade

Monarch Butterfly

Monarch Butterfly

Danaus plexippus

Diet: Herbivore as a larva; nectar feeder as an adult
Wild lifespan: Most breeding adults live two to five weeks; migratory overwintering adults may live six to nine months

Moose

Moose

Alces alces

Diet: Herbivore and browser
Wild lifespan: Commonly 10–15 years in the wild; some exceed 20

Moray Eel

ActinopterygiiAnimal group

Moray Eel

Muraenidae

Diet: Carnivorous family including fish, crustacean and mollusk specialists
Wild lifespan: Species-specific and incompletely documented; some large morays live for decades

Mossy Leaf-Tailed Gecko

Mossy Leaf-Tailed Gecko

Uroplatus sikorae

Diet: Nocturnal predator of small forest animals
Wild lifespan: Wild longevity is poorly measured; well-managed captive individuals may live for a decade or more

Mountain Goat

Mountain Goat

Oreamnos americanus

Diet: Herbivore
Wild lifespan: Often 10–15 years; females generally outlive males

Mountain Gorilla

Mountain Gorilla

Gorilla beringei beringei

Diet: Primarily herbivorous
Wild lifespan: Often 35–40 years in the wild

Muscovy Duck

Muscovy Duck

Cairina moschata

Diet: Omnivore
Wild lifespan: Variable; dependable population-wide maximum is not established