Key to the Chiroptera
           
 
 Color of body yellowish brown above, white below; rostrum long, nostrils encircled above by a horseshoe-shaped ridge (Fig. 18); tips of the ears erect; size large, forearm 51-61 mm in length; total teeth 28; one pair of upper incisors
   
 Color of body grayish brown to blackish brown above and below; rostrum short, bearing an erect, fleshy, club-shaped lump on either side (Fig. 19); tips of ears turned back and outwards; size medium, forearm 40-45 mm in length
 
           
Artiodactyla
 - 
Carnivora
 - 
Chiroptera
 - 
Didelphimorphia
 - 
Insectivora
 - 
Lagomorpha
 - 
Rodentia
 - 
Xenarthra
Scientific Names - Common Names