Ewoks are non-playable birds in the Moon Of Endor episode that resemble birds along with a bear-like appearance, similar to the original Ewoks. They are furry, unlike all the other birds except Terebacca. The main Ewok of them is Wicket (born 8 BBY on Endor).
According to the Angry Birds Star Wars Character Encyclopedia, their official name is Ewok Birds. They can loudly sing and use catapults. They squawk louder and louder when excited. They are most noisiest when they meet Bird Rebels. They can actually severely damage your hearing by their screeches. They are friendly to the Birds and fly in large flocks. Nobody other than other Ewoks (aside from C-3PYOLK) can actually understand what they are saying. Their home planet is Endor and are allies with any Bird Rebel.
In Angry Birds Star Wars II, Wicket the Ewok appears as a bird purchasable from the Shop. Their ability is an upgrade from the Blue Birds', which involves Wicket splitting into three then the three copies each multiplying two additional times, to form nine units.