The get in close part takes a lot of time. They get used to you being around then you gain there trust. Lots of hanging out closer and closer a little at a time. They will give a few quick and sharp crirps when they want you no closer. STOP and wait a wile then try another inch. If they crirp again wait a bit more then back out and try again next day. Little by little you will be accepted then you will need a macro lens. As for the blood look closely at the groves in the feet. A fledgling that has never flown or caught a fish has very cleen feet.