I have never found them to be very accurate. I grew up in CO and dont know anyone that ever said they took an animal on a survey since they didnt want to let others know an area is good. Consider that for a moment on a voluntary survey. The only things I got that were documented were sheep and goat because they have to be checked in person at a DOW station. I also shot 2 bear in CO but that was before it was mandatory to get them checked like it is now.