141 Animals that Start with O | List of Animals Beginning with O

“As we delve into the realm of creatures beginning with the letter ‘O,’ we encounter a rich variety of beings that call our planet home. From the nighttime-dwelling owl to the nimble orangutan, these animals have undergone evolutionary adaptations to thrive in various environments and lifestyles. In this piece, we will examine in detail some of the most captivating creatures whose names start with ‘O,’ exploring their biology, behavior, and conservation status.”

List of Common Animals Starting with O

• Oarfish
• Ocellaris Clownfish
• Ocelot
• Octopus
• Oilbird
• Okapi
• Old English Sheepdog
• Olive Ridley Sea Turtle
• Olm
• Opossum
• Orangutan
• Orb Weaver
• Orca
• Oriole
• Ornate Chorus Frog
• Ornate Hawk-Eagle
• Oryx
• Osprey
• Ostrich
• Otter
• Owl
• Owl Butterfly
• Ox
• Oyster
• Oystercatcher

Common Animals that Start with O | Interesting Facts & Pictures

Oarfish

“The planet’s lengthiest bony fish, which feeds on minuscule plankton.”

Ocellaris Clownfish

“Clownfish are initially born as males but possess the capability to transform into females. These fish inhabit reefs and lagoons in the vicinity of Australia and Southeast Asia.”

Ocelot

“A feral feline discovered in the forests of South America and southern North America. This creature preys on small mammals, birds, and reptiles.”

Octopus

“They possess three hearts and blue blood. Their boneless structure enables them to squeeze into confined spaces.”

Oilbird

“This bird employs echolocation to navigate the caves where it resides and nests, spanning from Trinidad/Guyana to Bolivia.”

Okapi These creatures belong to the giraffe family. Their tongue is long enough to clean their eyes and ears.

Old English Sheepdog When this dog breed first came to the United States, it was a common pet for wealthy individuals.

Olive Ridley Sea Turtle Capable of sleeping underwater for two hours before surfacing for air.

Olm This aquatic salamander has translucent skin.

Opossum Due to their low body temperature and immune systems, it’s rare for one to carry rabies.

Orangutan The two species of orangutans are critically endangered due to deforestation. These apes eat fruit, live in trees, and are native to Indonesia and Malaysia.

Orb Weaver There are over 3,000 species of these spiders, making it the third-largest spider family.

Orca Also known as the killer whale, they’re the largest member of the oceanic dolphin family. They are apex predators, meaning they’re at the top of the food chain.

Oriole Unlike many other insect-eating birds, orioles eat spiny or hairy caterpillars.

Ornate Chorus Frog This small frog is found in the southeast United States and in pine woodlands.

Ornate Hawk-Eagle This brown and white eagle has a large crest that is raised when the bird gets excited.

Oryx A very large antelope that can weigh anywhere from 220 to 450 pounds.

Osprey This bird is found in the Americas, Europe, Africa, Asia, and Australia.

Ostrich The world’s biggest bird and the fastest bird on land. They can run at 43 mph.

Otter Sea otters have the thickest fur of any animal.

Owl They can rotate their necks 270 degrees.

Owl Butterfly These butterflies get their name from the owl-like eye markings on the undersides of their wings. They’re found in Central and South American rainforests.

Ox People have depended on these strong animals to do work for about 6,000 years.

Oyster Their shells are made of two parts with a hinge along one end. Different oysters produce different things, such as being edible food or producing pearls.

Oystercatcher A large wading bird found on the coasts of Europe, Asia, and North Africa. These birds don’t typically eat oysters; instead, they consume cockles, mussels, and worms.

Animals Beginning with O (by Locations)

Wild Animals that Start with O

• Ocelot
• Okapi
• Orangutan
• Oryx
• Otter
• Ounce
• Osprey
• Ostrich
• Owl
• Orca
• Octopus
• Opossum

Domestic Animals Beginning with O

• Ox
• Ostrich
• Otter
• Old English Sheepdog
• Oriental Shorthair

Sea and Ocean Animals that Start with O

• Octopus
• Orca (Killer Whale)
• Oyster
• Ocean Sunfish
• Oceanic Whitetip Shark
• Opah (Moonfish)
• Osprey
• Olive Ridley Sea Turtle
• Orange Roughy
• Oceanic Dolphin
• Ocean Perch
• Ocean Triggerfish
• Ocean Quahog
• Ocean Rainbowfish
• Oceanic Pufferfish
• Oceanic Sea Spider
• Oceanic Saury
• Oceanic Barracuda
• Oceanic Lanternfish
• Oceanic Silverside
• Oceanic Squid
• Oceanic Needlefish
• Oceanic Hornetfish
• Oceanic Bonito
• Oceanic Skipjack
• Oceanic Surgeonfish
• Oceanic Kelpfish
• Oceanic Trumpeter
• Oceanic Whiptail
• Oceanic Dottyback

Zoo Animals that Start with O

• Ocelot
• Octopus
• Okapi
• Olive baboon
• Opossum
• Orangutan
• Oryx
• Ostrich
• Otter
• Owl
• Ox
• Ozark hellbender (a type of salamander)
• Osprey (a type of bird)
• Ocean sunfish (also known as Mola Mola)
• Orange-winged amazon (a type of parrot)
• Orange-headed thrush (a type of bird)
• Orange-bellied parrot
• Oriental small-clawed otter
• Oriental pied hornbill (a type of bird)
• Olive ridley sea turtle.

Animals with O (by Types)

Mammals that Start with O

• Ocelot
• Olingo
• Okapi
• Olive baboon
• Onager
• Orangutan
• Oribi
• Otter
• Ox
• Ozark big-eared bat

Insects that Start with O

• Oak gall wasp
• Oak leafroller
• Oak leaf skeletonizer
• Oak processionary moth
• Oat bug
• Oatmeal moth
• Ocellate gallinipper
• Ochre mark leafhopper
• Ochreous stink bug
• Octolasion earthworm
• Odd-legged weevil
• Oil beetle
• Oil palm bunch moth
• Old-house borer
• Oleander aphid
• Oleander caterpillar
• Olive fruit fly
• Olive lace bug
• Olive treehopper
• Onion maggot
• Onion thrips
• Orange assassin bug
• Orange barred sulphur
• Orange bug
• Orange dog
• Orange mint moth
• Orange oakleaf
• Orange-spotted tiger clearwing moth
• Orchard ermine moth
• Orchard orb-weaver
• Oriental beetle
• Oriental cockroach
• Ornate moth
• Osage orange gall
• Osmia bee
• Osteopilus treefrog
• Ostomyia moth
• Otala snail
• Owl fly
• Ox beetle

Birds that Start with O

• Ocellated turkey
• Ochre-breasted antpitta
• Olive-backed sunbird
• Olive-sided flycatcher
• Orange-bellied flowerpecker
• Orange-billed nightingale-thrush
• Orange-breasted bunting
• Orange-breasted green pigeon
• Orange-cheeked waxbill
• Orange-crowned warbler
• Orange-fronted parakeet
• Orange-headed thrush
• Orange-winged amazon
• Oriental bay owl
• Oriental darter
• Oriental honey-buzzard
• Oriental magpie-robin
• Oriental pied hornbill
• Osprey
• Ostrich
• Ovenbird
• Owl finch
• Owlet-nightjar
• Oxford ragwort bee-fly

Animals Starting with the Letter “O” for Kindergarten

• Octopus
• Otter
• Ostrich
• Orangutan
• Owl
• Ocelot
• Osprey
• Orca
• Oyster
• Okapi

Frequently Asked Questions on O Animals

What are some animals that start with O?

Some animals that start with the letter O are otter, orca, octopus, oppossum, ox, ostrich, orangutan, ocelot, oyster, okapi, oarfish, ox and owls.

What are African animals that begin with O?

There are several African animals that start with the letter “O”. Some of them are the oribi, orangutan, okapi, ostriches, olm monkey, orca whale, orange-spotted Filefish and olive Baboon.