List of Animals Starting With O | Animal Names & Facts

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Ostrich, otter, orangutan, ocelot, opossum, octopus, orca, owl, ox, and okapi are common animals starting with O found in many different habitats around the world. These animals that begin with the letter O include wild animals, birds, sea creatures, and small mammals, which help kids expand their animal vocabulary.

The letter O brings an outstanding mix from clever hunters like ocelots and orcas to gentle giants such as orangutans and oxen. Let’s explore O animals for kids to discover about nature.

Alphabetical List of Animals Starting With O

Oak Toad Oarfish
Ocean Perch Ocean Pout
Ocean Whitefish Oceanic Whitetip Shark
Ocellated Turkey Ocelot
Octopus Oenpelli python
Oilfish Okapi
Old English Sheepdog Old House Borer
Oleander Hawk Moth Olingo
Olive Baboon Olive python
Olive Sea Snake Olm
Olympic Marmot Onagadori Chicken
Onager Opabinia
Opah Opaleye (Rudderfish)
Opossum Oranda Goldfish
Orange Baboon Tarantula Orange Dream Ball Python
Orange Roughy Orange Spider
Orange Tanager Orange-Crowned Warbler
Orangutan Orb Weaver
Orchard Oriole Orchid Dottyback
Oregon Spotted Frog Ori-Pei
Oribi Oriental Cockroach
Oriental Dwarf Kingfisher Orinoco Crocodile
Ornate Bichir Ornate Black-Tailed Rattlesnake
Ornate Box Turtle Ornithocheirus
Ornithomimus Ortolan Bunting
Oscar Fish Osprey
Ostracod Ostrich
Otter Otterhound
Ovenbird Oviraptor
Owl Owl Butterfly
Owlfly (Ascalaphidae) Ox
Oxpecker Oyster
Oyster Toadfish Ozark Bass

Animals Starting with O: Explore Them by Location

Here is a useful list of common animals beginning with O:

Wild Animals Starting With O

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

Domestic Animals That Start With O

Here are domestic animals with “O”:

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

Sea and Ocean Animals Beginning With O

Here are sea animals beginning with the letter “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

Here are O animals related to the zoo for kids’ learning: 

Ocelot Octopus
Okapi Olive baboon
Opossum Orangutan
Oryx Ostrich
Otter Owl
Ox Ozark hellbender
Osprey Ocean sunfish
Orange-winged amazon Orange-headed thrush
Orange-bellied parrot Oriental small-clawed otter
Oriental pied hornbill Olive ridley sea turtle

Animals Starting With Letter O: Explore Them by Types

List of Mammals That Start With O

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

Insects That Begin 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
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 Starting 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

Frequently Asked Questions on Animals with O

What animals start with the letter O for kindergarten?

Ans:

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

What are common jungle animals starting with the letter O?

Ans:

  • Orangutan
  • Ocelot
  • Okapi
  • Otter
  • Opossum

What are 10 animals starting with O, with facts?

Ans:

  1. Olingo: It lives high in rainforest canopies avoiding ground predators.
  2. Oxpecker: Feeds on ticks while perched on large mammals.
  3. Oryx: Survives desert heat using remarkable internal cooling adaptations.
  4. Olm: Spends its entire life underwater inside deep European caves.
  5. Ocelot: Hunts silently at night using excellent depth perception.
  6. Oribi: Escapes danger by performing sudden high-speed zigzag movements.
  7. Oystercatcher: Cracks tough shells using powerful, long, orange bills.
  8. Oilbird: Navigates dark caves using advanced natural echolocation abilities.
  9. Onager: Runs incredible distances across harsh desert landscapes efficiently.
  10. Oval Squid: Changes colors instantly to confuse predators during movement.

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