usually if a bird is sick, they will stay 'fluffed up' and lean forward on the perch, rather than usual with tail down.
however i am concerned about the wheezing and the wings open might be a sign that he is hot. has he dipped himself in his water dish at all? do you have AC? Bring the lil guy to a vet if his breathing deosn't seem normal.
also, you could look up at bird talk magazine: http://www.animalnetwork.com/birdtalk/
