So accordingly to people says zombies in dayz not supernatural thing they are just infected human beings and our chars are immune to this infection.      - With that theory ( actually i love that theory ) zombies are just hungry predator animals. They attack people not because we are enemy, we are food for them. Ok then.    - So predator animals attacks the most weak prey. If i hurt a random guy i met, while chasing by 15 zombies. Zombies must disengage me attack him and eat him. - maybe theres a system or time count for zombies keep eating him and ignore me.   - while zombies eating him if i try to save him or get too close his body they must attack me ( i mean on wild life documentaries lion hunts a deer and tries cover his food from other animals until hes done )  - zombies should act like wolf pack on this kind of situations, they can fight each other to eat dead guy sometimes.  - well fed zombies should be slower and covered with blood.   - with that way we can distract them using raw meat or body parts and blood. ( of course its gonna be loud :) )       - So about the crows and birds.   in dayz Mod dead bodies was making a fly sound and that makes finding corpses easier.    here is the thing -  crows and vultures spawns 200 mt. away from dead body ( in air or on trees ), flies to dead guys location and start drawing circles like old western movies. Im not trying to say that should happen every time someone dies. 3 to 1 chance is good for that :)    we can see crows flying above the town and be more cautious in there.   - Sniper's worst enemy the BIRD :D   also we need birds on trees.   - If someone in treeline birds does not sing. - if you shoot your gun in there birds gonna fly and reveal your possible location. - also we need idenical bird sounds to know them in trees.   That would be nice feature for sniper wars. Sniper needs to relocate after shot.    - Plz devs put some nice harmless birds at sniper hot spots and give fresh spawn guy a chance.