Close-up of a wet otter lying on grass, looking slightly to the side. cover animal O animal name — "North American river otter" by pixel2013 is licensed under CC CC0 1.0

Animals that start with O

Curious about animals starting with 'O'? Browse our complete list of animals that start with the letter O in this comprehensive guide. Click any animal to discover fascinating facts, habitat information, and more about these incredible creatures. Each entry includes detailed photos, common questions, and interesting details to help you explore these amazing species.

Close-up of a wet otter lying on grass, looking slightly to the side. cover animal O animal name — "North American river otter" by pixel2013 is licensed under CC CC0 1.0

Find animals that start with:

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D

E

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G

H

I

J

K

L

M

N

O

P

Q

R

S

T

U

V

W

X

Y

Z

Oyster

Ostrea

Otter

Lutra lutra

Owl

Strigiformes

Orangutan

Pongo

Osprey

Pandion haliaetus

Opossum

Didelphis virginiana

Octopus

Octopus Vulgaris

Olive Sea Snake

Olive Sea Snake

Aipysurus laevis

Ovenbird

Seiurus aurocapilla

Orange Roughy

Hoplostethus atlanticus

Olingo

Bassaricyon gabbii

Olive Baboon

Papio anubis

Olive python

Liasis olivaceus

Olm

Proteus anguinus

Olympic Marmot

Marmota olympus

Onager

Equus hemionus

Opaleye (Rudderfish)

Opaleye (Rudderfish)

Girella nigricans

Oranda Goldfish

Oranda Goldfish

Carassius auratus

Orange Baboon Tarantula

Orange Baboon Tarantula

Pterinochilus murinus

Ocelot

Leopardus pardalis

Oilfish

Ruvettus pretiosus