Phenology and predictors of spring emergence for the Timber Rattlesnake (Crotalus horridus) 1Illinois Natural History Survey, Prairie Research Institute, Champaign, IL, USA 2Department of Biology and Natural Resources, Principia College, Elsah, IL, USA 3Unaffiliated, Morrison, IL, USA 4Illinois Department of Natural Resources, Carterville, IL, USA DOI 10.7717/peerj.16044 Academic Editor Armando Sunny Subject Areas Animal Behavior, Ecology, Zoology Keywords Brumation, Degree days, Hibernacula,...
