Ride

When spawning as a human (Which will be your current avatar) you can ride other animals by sending them a ride requests these are similar to the pack invite requests

If they accept, you will be on the animal's back in a sit pose and you wont be able to move unless you dismount

Not every animal allows you to ride, here's the list Humans can't be rided and cubs cant ride other adults.

To dismount the animal press the button "Dismount on the right side of your screen. The riding update was added before the Christmas event, in the logo Ragnar appeared riding a brown adult bear