Mammals that Start with O By A-Z Animals Staff Published: April 23, 2021© Cody Pope, CC BY-SA 2.5, via Wikimedia Commons – License / Original Share on: How to Add Us to Google News Sending You to Google News in 3Animals HomeAll AnimalsMammals!Mammals that Start with O Find your favorite Animals! SearchAdvertisement WATCH: Sharks biting alligators, the most epic lion battles, and MUCH more.Enter your email in the box below to get the most mind-blowing animal stories and videos delivered directly to your inbox every day. Thanks for subscribing!Jump to any letterABCDEFGHIJKLMNOPQRSTUVWXYZMammals that Start with the Letter OOcelotAlso known as the Painted Leopard!OkapiEats more than 100 different types of plants!Old English SheepdogIntelligent, sociable and playful!OlingoOlingos are part of the raccoon family.Olive BaboonOlive baboons will sometimes form strong friendships with each otherOnagerAn onager's coat changes color with the season.OpossumThought to be immune to certain snake venom!OrangutanShares 97% of its DNA with humans!OribiMales oribis spend most of their time patrolling the borders of their territories; they can do this about 16 times an hour! However, 27% of their day is spent grazing.OtterThere are 13 different species worldwideOtterhoundOtterhounds have webbed feet making them great swimmers!OxAlphabetical List of Mammals that Start with OOcelotOkapiOld English SheepdogOlingoOlive BaboonOnagerOpossumOrangutanOribiOtterOtterhoundOx Share on: How to Add Us to Google News Sending You to Google News in 3 About the Author A-Z Animals Staff AZ Animals is a growing team of animals experts, researchers, farmers, conservationists, writers, editors, and -- of course -- pet owners who have come together to help you better understand the animal kingdom and how we interact.Thank you for reading! Have some feedback for us? Contact the AZ Animals editorial team.