Did you ever see Dreamscarred Press's April Augmented 2017 for Pathfinder 1E? It had several variant subraces for, among others, the tengu. You could play a dodo tengu, emu tengu, shoebill tengu, or even a potoo tengu!Have a PC kenku (either played by me or someone else in the group) who can only speak dialogue by repeating phrases she would have likely heard. I thought this sounded like a horrible idea until someone in a group I DM did it and was fantastic at it.