Is the bird still there? If so, I think you should try and catch him and take him to a rehab center. Place it in a CARDBOARD BOX lined w/ a papertowel or sheet (no towels...they can get their feet tangled in it). Cages and Aquariums are the last thing you want to put a wild bird in b/c they can really hurt themselves further by slamming into the glass to escape or damaging their feathers and head trying to get thru wire. You have to have a federal permit to keep a native bird, so you can't keep it and heal it yourself. Most vets do NOT have permits and know very little about wildlife, so you should contact a licensed rehabber.