Key to the Chiroptera
           
 
 Ears long, 15-18 mm from notch, and when laid forward extending conspicuously beyond tip of nose; hair on back long (to 1 cm in length); condylobasal length averages 14 mm; found only in eastern Oklahoma
   
 Ears shorter, 15 mm or less from notch, and when laid forward extend only to near tip of nose; hairs on back not conspicuously long (usually less than 1 cm in length)
 
           
Artiodactyla
 - 
Carnivora
 - 
Chiroptera
 - 
Didelphimorphia
 - 
Insectivora
 - 
Lagomorpha
 - 
Rodentia
 - 
Xenarthra
Scientific Names - Common Names