The animal kingdom is home to a diverse range of animals that start with O, spanning across mammals, birds, reptiles, fish, insects, and other invertebrates. From the mighty Orangutan, known for its intelligence, to the Olive Ridley Sea Turtle, a crucial marine species, and the Ostrich, the world’s largest bird, these creatures showcase nature’s vast diversity. The Ocelot is a stealthy jungle predator, while Octopuses exhibit incredible problem-solving skills. Ocean Sunfish and Opah dominate the marine world, while insects like the Oleander Hawk Moth add to the beauty of the natural ecosystem. This extended list of animals that start with O highlights nature’s incredible biodiversity. 🌍✨
🌿 Animals That Start with O 🌿
🐾 Mammals
Orangutan
Ocelot
Okapi
Otter
Oribi (Small Antelope)
Old English Sheepdog
Olive Baboon
Onager (Wild Asian Donkey)
Ox
Orlov Trotter (Horse Breed)
Olingo
Opossum
Olympic Marmot
Ovcharka (Caucasian Shepherd Dog)
Oriental Small-Clawed Otter
Orange Bat
Otterhound
Oryx (African Antelope)
Ounce (Another name for Snow Leopard)
Ochre Bush Squirrel
🦜 Birds
Ostrich
Osprey
Oriole
Orange-Bellied Parrot
Olive-Backed Sunbird
Oriental Darter
Oriental Magpie Robin
Olive Pigeon
Orange-Breasted Falcon
Olive-Sided Flycatcher
Orange-Crowned Warbler
Ovenbird
Oriental Honey Buzzard
Orange-Winged Amazon (Parrot)
Olive Sparrow
Orange-Tufted Sunbird
Opal-Rumped Tanager
Oahu Amakihi (Hawaiian Bird)
Okinawa Rail
Ochre-Breasted Antpitta
🦎 Reptiles & Amphibians
Olive Ridley Sea Turtle
Ornate Box Turtle
Ocellated Lizard
Orange-Throated Whiptail
Oriental Vine Snake
Oregon Spotted Frog
Ochre-Bellied Anole
Oaxacan Spiny Lizard
Ocellated Gecko
One-Toed Amphiuma
Olive Python
Okinawan Habu Snake
Ocellated Skink
Olive-Striped Tegu
Oriental Fire-Bellied Toad
🐠 Fish
Ocean Sunfish (Mola Mola)
Opah (Moonfish)
Ornate Wrasse
Orange Roughy
Olive Flounder
Ocellaris Clownfish (False Clownfish)
Oriental Loach
Olive Rockfish
Ossetra Sturgeon
Orangespot Surgeonfish
Otocinclus Catfish
Opaline Gourami
Ocean Perch
Onefin Skate
Orange-Spotted Filefish
Okhotsk Atka Mackerel
Ocellated Freshwater Stingray
Ogilby’s Ghost Goby
🦋 Insects & Arachnids
Oleander Hawk Moth
Orange Sulphur Butterfly
Orchard Spider
Orange-Tip Butterfly
Orchid Mantis
Oak Tree Hopper
Ochre Ringlet Butterfly
Oriental Hornet
Orange Stag Beetle
Obscure Dagger Moth
Olive Tree Weevil
One-Spotted Prepona Butterfly
Orange-Veined Moth
Owl Moth
Orb-Weaving Spider
Olive Grasshopper
🦀 Other Invertebrates
Octopus (Common, Giant Pacific, Blue-Ringed, etc.)
Olive Snail
Ocellated Octopus
Orange Sea Star
Opossum Shrimp
Ochre Sea Cucumber
Osage Orange Bug
Opalescent Squid
Oriental River Prawn
Oyster
Ochre Starfish
Orbicular Urchin
Olive Flatworm