(6 youn-); Chestnut-collared Lonc^spur, 1 (4 eg-s). A pair of 

 prairie falcons nested several miles from this and the other 

 plots: much of the area was used by the pair for hunting. Other 

 vertebrates encountered on the plot during census runs: Prairie 

 Rattlesnake ( Crotalus viridis ), White-tailed Jackrabbit C Leous 

 tov.-nsendi ) , Pi-'-^-^^rhorn ( Antilocapra american a) . 



231 



