I need help reading domesticated pigeon behavior and body language?

It would be great if you would post a picture. The wing slapping is perfectly normal pigeon behavior.

What are you feeding him?
Is this your only pigeon?

It also would be helpful to know where you are located so we may be able to recommend a resource from our list.

JashimChando wrote:

When I try to enter the carrier he hits me with his wing. I assume this is because he's upset.
When I let him out of the carrier, or there's too much stimulation around he starts to shake. I assume this is fear/anxiety?

Wing slapping is normal - the pigeon is just telling you to back off.
The shaking is most likely fear/anxiety like you say since it seems to me that the pigeon isn't very tame and probably is a bit scared of his surroundings or you. But you are doing the right thing by helping him survive and grow but you should contact a local pigeon rescuer who can advise you on what to do (especially when it comes to releasing the pigeon, if that is something you want to do).
But if all else fails we are here to help!

Hi, JashimChando!

Thank you for looking after that pigeon, and I'm very glad to hear that he's eating and drinking well.

As Matilda and Mrs.AviatorRodent said, it's normal for pigeons to 'wingslap' when we intrude on what they consider to be their territory. They need to have a place that they consider sheltered and safe (in this case, the carrier) and they will defend it from intrusion. Males do it more than females, as a rule. Some of mine do that when I put my hand in their cage, but once they're out to exercise, they're fine.

The shaking can be two things: either fear/nervousness, which would be natural as he's in an unfamiliar environment, or excitement, especially if he gets something nice to est when he comes out!

Please let us know how he's getting on.

With mine, it's the females who are the worst. LOL. Can you post a picture?