http://shilala.com/injection.html
nice article illustrated with photos

http://www.iacuc.arizona.edu/training/p ... nject.html
INJECTIONS AND VENIPUNCTURE SITES:
There are three injection sites commonly used in birds: IV, IM and SQ.
Location of the alar vein.

1. Intravenous (IV) - mainly performed on the alar vein located at the "elbow," (the humeral-radial-ulnar junction), on the underneath, or ventral aspect of the wing

2. Intramuscular (IM) - mainly performed on the breast muscle that is on either side of the prominent ridge of the sternum or keel bone. If performed on the thigh muscle, be certain to remember the possible toxic effects due to the renal portal system. If multiple injections need to be administered, vary the injection sites as much as possible.
Breast muscles alongside ridge of sternum
3. Subcutaneous (SQ) - mainly performed in the loose skin covering the keel bone.