The answer to that question would be: "WHO CARES?"
Actually this is just a guess, but is it because the federal govt. regulates hunting crows? They are considered a migratory game bird right? Well anyway, if the govt regulates them, you know they cant do anything right and thats why crow hunting has crazy regs.
Since crows are a migratory species they are regulated by Canada, US, and Mexico and they all have a say. In some Mexican cultures the crow is honored. The Mexican government requested the crows were not hunted the Tuesdays and Wednesdays due to the cultures rituals. Sorry, I don't remember the culture. It may have been the Mayans.