So we all assume that Fletchling is the primary regional bird (ie Pidgey, Hoothoot, Taillow, Starly, Pidove) right? Well is there any confirmation on it...

I'm only assuming this because of Talonflame's Fire/Flying typing. The primary bird is always Normal/Flying. Maybe Fletchling is the secondary bird (Spearow/Wingull) in the case of Wingull is had a secondary typing.