A "trick taking", "take that", "head to head" or scalable to "full party" card game of avian revenge.
Players get their own special deck whose composition is the same as their opponents but themed differently, with custom art for their flock of quirk fowl, unhelpful humans, and oddball felines.
Players then take turns calling out actions (bird calls?) that everyone at the table must do or be forced to discard a card. Players may call out actions to add cards their everyone's hands, attack and claim the ever growing pile of humans who invade their world, and try to assemble their mighty bridforce in a flying V formation.
Play continues in this manner until one player meets one of two conditions, either a full flying v formation (explained in more detail in the rules) or runs out of cards to add to their flock. Players then tabulate points to see who has flown to the top and is the new APEX FLOCKER!
Flock together. Fly in formation. Swoop to victory. If the humans don't like it...Flock 'em.