if you follow me on google plus you'd see a post about "birdsworld" which is an AU idea i had where edd and the gang are birds. edd is a cockatiel, tom is a blue jay, and matt is a peacock, other characters don't have a bird species let (unless you count trashie as a character)
they hatch out of egg like normal birds but they aren't the weird featherless tiny creatures, they come with the feathers
they have the normal diet of a bird. seeds, fruit, and worms. they eat like normal humans do to them being anthro
there isn't humans, cats, bears, ect, to catch and eat them so they aren't scared of getting eaten
birds that can fly (like pigeons) have two sets of wings, one for their arms, one for flying. birds that can't fly (like flamingos) only have one set, but if they are stupid they try to fly, but they fail
went it comes to breeding. if two of the same bird species (like two owls) will always have a baby that is their species. if two birds that aren't the same species (like a blue jay and a peacock) will not have a cross of their species, they will have a 50/50 chance of having one of the parents species
kinda explaining out how anthro birds work but whatever