All of these pictures must have been taken on Texas ranches. I don't agree with all of their assessments (because I have different ageing standards), but they are pretty consistent for the standards they have chosen.
Basically they give you a 5 second video clip and you have to decide if the deer should be shot or not based on age. 3 or less no... 4+ yes (that is their mature/imature barrier)
It's called "shoot or wait" and can be found here.
http://www.whitetaildomains.com/ShootOrWait/ShootOrWait.aspx
I was bored at work the other day and this kept me occupied for about 30 minutes.
Pretty cool practice for ageing deer
