Having had the pleasure of meeting Pokémon game director and  co-creator Jun’ichi Masuda during his visit to London, not to mention  having spent the last two years subtitling a lot of his announcements, I  decided to contact him regarding this mysterious bird-like Pokémon.  He’s aware from our previous chat (albeit brief) of us here at  PokéJungle and our loyal fans. I’ve not translated the unnecessary bits.
Kriffix:“…Just what is that bird-like Pokémon from the released AR Searcher pics? Is it a secret? “ 
 Masuda:”Good morning! It’s been a long time  since we last met! Oh, how perceptive of you! However I have to say ‘no  comment’! (>_<)”
 Dang. So basically we weren’t able to gather much from this, other  than the fact it is something he cannot comment on. The possible reasons  for this are as follows;
1.He does not want to spoil what Pokémon are obtainable in the game
2.Although Gamefreak now have some 3D designers and it  may well in fact be them working on the game, he may not want to comment  on work that is potentially done by ‘Creatures’ inc.
3.It’s a new Pokémon/form and so he can’t comment on it yet.