Okay me again.
I found this little bastard it was nr 72 BUT the thing is i was checking that place before and im 100% SURE that the container was empty (i remember myselft standing inside it, jumping, shooting in case it was invisible or sth) i just assumed that i killed that pigeon while story missions or while running around and doing some random stuff like killing but then i go another round after only one and it is there it appeared there just like that, i know you wont believe me but its TRUE (im playing on ps3) it wasnt there the first time!!! Good not that many pigeons in my city :) they're better watch out xD

I used another guide and i missed one fkn pigeon, now ill use your map and pics to re-check, hope it will help :D Second time it goes faster.