During mandatory checks Colorado Parks and Wildlife will extract and collect a small tooth located just behind either upper canine tooth. This tooth is sent to a lab for age determination. Hunters can help by making sure that the head is not frozen during the mandatory check and that the jaw is propped open before rigor sets in. Mountain lion and bear age data is provided online so hunters can look up the age of their harvested animal by seal number. This is the only way for hunters to find this information. For privacy reasons, hunter’s names are not posted.
Bear age results for the prior year are typically posted in April or May. Lion age results for the prior year are typically posted in July.
The results also include some animals that died as road-kills and other forms of mortality. The age is reported as an age class. This means a 0 = cub or kitten, 0 to about 9 months old, 1 = about 10 to 18 months old, 2 = about 1.5 years to 2.5 years old, and so on.
Larimer County Elk and Moose
Bull elk hunters in GMUs 7, 8, 9, 19, 191 & 20 and northern Front Range cow and bull moose hunters who participated in submitting teeth during the fall of 2011 can follow the below link for age results.
Cementum annuli analysis results (bull age) are sorted by the last 5 numbers of individual hunter CID #s within each huntcode. Hunter CID #s are the 9-digit numbers assigned to each hunter and are shown on any hunting or fishing license.
The rifle raffle drawing has occurred and the winner has been notified. Thanks to all hunters who participated in submitting teeth!
Mule Deer
Hunters who harvested mule deer bucks in
Southwest Colorado, GMUs 54, 61, 62, 75, 77, 78, 80, 81, 751 and 771, can find the age of their animals and
get the 2011 project updates by visiting the
Mule Deer Aging Project page.
The purpose of the mule deer aging study is to try to determine whether there is an optimum buck-to-doe ratio to manage for that maximizes both hunt quality and hunter opportunity. This project will also help biologists examine how the age structure of harvested bucks changes in relation to winter severity.
Middle Park buck age data 
(Northwest Colorado, GMUs 27, 181, 18, 37, 371 and 28) is also available.