O is one of the smallest mammal letters but full of distinctive species: orangutans, ocelots, okapis, otters and the Otterhound dog breed. Here’s the complete guide to mammals beginning with O.
Quick facts about mammals starting with O
- Total entries: 9 mammals whose names start with O.
- Wild mammal species: 6.
- Dog breeds: 1.
- Cat breeds: 2.
- Rabbit breeds: 0.
Wild mammals starting with O
A-to-Z list of wild mammal species whose common names begin with this letter.
Dog breeds starting with O
Domestic dog breeds whose names begin with this letter.
Cat breeds starting with O
Domestic cat breeds whose names begin with this letter.
Frequently asked questions
How many mammals start with the letter O?
Animal Corner covers 9 mammals whose names begin with the letter O, including 6 wild mammal species, 1 dog breeds, 2 cat breeds and 0 rabbit breeds. Use the lists above to browse each category.
What is the most famous mammal that starts with O?
The standout wild mammal name starting with O is the orangutan, ocelot, okapi and otter. Among domestic breeds, popular O-starting names include the Otterhound.
Are dogs, cats and rabbits considered mammals?
Yes. All dogs, cats and rabbits are mammals, alongside wild species like deer, elephants and whales. Mammals are warm-blooded vertebrates that nurse their young; this includes both wild species and the domesticated breeds derived from them.
What’s the smallest mammal whose name starts with O?
That depends on the letter, but on this page some of the smaller O-starting mammals include rabbit breeds and toy dog breeds. For wild species, see the species guides linked above.
How can I find more mammals on Animal Corner?
Browse the Animal Corner mammals hub at /mammal/ for the complete A-to-Z list, or use our individual breed pages: /dog-breeds/, /cat-breeds/ and /rabbit-breeds/.
Browse more: mammals hub, dog breeds, cat breeds, rabbit breeds.