A chimeric beast with the head, beak, and talons of an owl and the body of a bear.

Behind the fruit cart, you spy an owlbear rummaging for a snack. Behind you, a Giant Scorpion emerges from a dark archway. It seems the Arena’s menagerie has been compromised. - Tome of Encounters (RPA-Tome-ADV4-29) 

Owlbears are omnivorous.

In the Sabek city square, a Giant Scorpion and Owlbear have both escaped Taron's Arena and approach a distracted Lady Emilia Duntum, should you have met her earlier that day and let her walk home alone. - Tome of Encounters (RPA-Tome-ADV4-29)

• Slay the beasts and seemingly save her life.
• Leave the area in defeat; Emilia disappears.

A match at the Colosseum of Ashes pits you against a Human girl and her owlbear. - Tome of Encounters (RPA-Tome-SQ1-1)

• Put the beast down and you win the match, leaving the girl in angry tears.
• Be overpowered and the girl will thank you for the fun, her owlbear returning to her.

An owlbear escaped from Taron's Arena in Sabek threatens to end the lives of a few merchants:

• Intervene and save the merchants, putting the beast down for good and be rewarded with gold.
• Allow the owlbear to have a meal, and receive the blessing of the observing priest of Hakehto.