In the world of cutesy animal names there is often some confusion over categorization. For example, when is a doggo also a pupper, does that disqualify them from being a pupperino?
When it comes to the avian world, the main question is thus: "When does a birb become a borb?" At what stage of roundness does a bird's orb-like appearance merit a name change?
(Future linguists are going to be very confused by this era...)