We used radiotelemetry and searched with a trained hound to locate the dens of 3 recently parturient mountain lions (Felis concolor). These dens were located in dense riparian vegetation along the same stream in the bottom of a steep canyon. We monitored circadian temperatures of 2 dens at 1-h intervals and compared them to ambient temperatures recorded simultaneously. We found mountain lion dens to effectively moderate high ambient temperatures, but these dens failed to provide a thermal advantage at the lowest ambient temperatures recorded in this investigation. We conclude that mountain lion dens provide effective protection from thermal maxima for young, immobile kittens.
Bleich, Vernon C.; Pierce, Becky M.; Davis, Jeffrey L.; and Davis, Vicki L.
"Thermal characteristics of montain lion dens,"
Great Basin Naturalist: Vol. 56
, Article 12.
Available at: http://scholarsarchive.byu.edu/gbn/vol56/iss3/12