That's actually a great idea. I've always wanted there to be option for bird Popori so I can fulfil my true dream of being a duck/penguin berserker in some way! Perhaps avian Popori (and Elin) can be introduced to the game in some way with a story of some sort.

For example, these bird Popori/Elin were forced to leave Pora Elinu because they were too extreme in protecting nature and kept on fighting with the mammalian Popori. These Popori/Elin eventually left to form a city dedicated to Elinu in a dark and twisted way up Northern Arun where the npc's attack you for MASSIVE DAMAGE if you try to enter. One of the story quests could involve the player in being an ambassador to Pora Elinu and they'd have to find to reunite the two factions in some way with the reward being something like a faster mount and the ability to freely travel in the city which will have merchants unique to the city.

TL:DR Bird Popori/Elin are a great idea and there are plenty of ways to introduce them in game through lore and interesting gameplay if done right.

I'd invent a plague that killed all Elin and popori and added zombies and skeletons as races. I just can't take popori or Elin seriously.

an avian popo would be a source of chiken/kfc jokes. i am neutral for it but that's because i never plan to play one. Also...i can't imagine a chicken popo holding an axe or a bow...at best the disc for sorc...would they have hands or wings? it'd be wierd to have a chicken with the arms of a bear (i thnk you can't change that).

I think popos are a little fat to make a good chicken but then again they will be more funny than cool looking so why not.