Phenology

Phenology is the study of natural phenomena that recur periodically.  It is observing and knowing what and when things are happening outside.  This morning in January the chorus frogs were calling and they usually do call on warm, wet days and nights in mid-winter in north Louisiana.  Their name is excellent, because many frogs call at one time in "chorus."  The frog, who starts the chorus, is called a "bout leader."  The call of chorus frogs sounds like "pulling a thumb down the teeth of a plastic comb."
Go outside tonight and listen.  You may hear the call of the chorus frogs.