The crows do not move into shooting range. Two hunters leave the blind, however the crows know that there is one more in there. When the third hunter leaves, the crows know that all are gone and resume their normal activity. Whether or not this is true, I do not know. I have read it often enough that I am sure that someone has witnessed this occurrence.
Crows have extremely good memory.
Enemies and Predators - Owls and hawks are two of the crows' enemies. Crows will often gather together and mob an offending or intruding owl or hawk. Man, at times, can also be considered an enemy of the crow. Those who hunt crows are certainly enemies. Geographic distribution - Crows are found all over the world, except for New Zealand, Antarctica, and South America.