This is copied directly from my blog, and I was also quite certain that I had spelled it out in the main story; but seeing as I have had multiple questions:

Wing types

Stan: Golden Eagle(when he's not messing with the color to impersonate Ford )

Ford: Snowy Owl

Dipper&Mabel's father: Red Tailed Hawk

Dipper: Harpy Eagle

Mabel: Scarlet Macaw

Wendy: American Robin

Robbie: Pigeon(but he dyes the feathers to make them look like crow's wings)

No wings:

Soos

Fiddleford McGucket

Gleeful family

Dipper&Mabel's mother(+her side of the family)

(but seriously, most questions are answered at length on my blog. It keeps the stories on here from getting cluttered)