Hello! I was just killing in Kael and got the following: Mon Jun 22 21:04:24 2020] You gain party experience! Mon Jun 22 21:04:25 2020] A restless dire wolf's corpse becomes inanimate and slumps to the floor. Mon Jun 22 21:04:25 2020] A restless dire wolf has been slain by XXX! Mon Jun 22 21:04:29 2020] You have completed achievement: Bird Flew Seems that at least the wolves count as Aviaks or some other birds .... Tilail
It's been that way since ToV launch, and yes, they are aware that killing the wolves count as birds as far as achievements go. Theres a thread buried somewhere around here where they mentioned it and may or may not do anything about it.
This is a known issue. The race def entry for the wolf was previously reserved for a bird NPC that we did not get, and so the entry was repurposed, but this was after data was added for slayer achievements. We have a ticket tracking it.