Rusty crayfish have been discovered in the headwaters of the Yampa River. To prevent the spread of rusty crayfish within and beyond the Yampa River basin, the Director of the Division of Wildlife has issued an
immediate order (4MB PDF)
that prevents the removal of any live crayfish from the Yampa River, and any streams, lakes, canals or rivers that adjoin the Yampa River.
Source:
http://wildlife.state.co.us/Wildlife...tyCrayfish.htm
In the Yampa River basin from its headwaters downstream to the Colorado
-Utah state line, including all tributaries, reservoirs, lakes and canals -
All crayfish must be returned to the water of origin immediately or killed and taken into possession immediately upon catch with kill being effected by separating the abdomen from the cephalothorax (tail from body), beginning 12:01 a.m., April 10, 2010 and extending through 11:59 p.m., December 31,2010.
SOurce:http://wildlife.state.co.us/NR/rdonl...sureLetter.pdf