Just $.02 from Missouri...We have check stations in our state, requiring you to take your deer or turkey there to have the harvest recorded. This does two things, first, it helps in the management aspect, keeping a pretty accurate count of harvested game. The second reason is for law enforcement.
The check stations in Missouri are usually mom and pop gas stations and they receive $1 for each time an animal is checked in, which can generate a little extra revenue.
Oh, and Sludge, don't hold back on your feelings on the DNR of Iowa not holding a dove season! I can't seem to get my shotgun barrel to hit those silly things...and I can't get my wife to cook them!