FAMILY:
ALLIGATORIDAE
A. mississippiensis
A. sinensis
C. crocodilus
C. c. apaporiensis
C. c. fuscus
C. latirostris
C. yacare
M. niger
P. palpebrosus
P. trigonatus
FAMILY:
CROCODYLIDAE
C. acutus
C. intermedius
C. johnstoni
C. mindorensis
C. moreletii
C. niloticus
C. novaeguineae
C. palustris
C. porosus
C. rhombifer
C. siamensis
M. cataphractus
O. tetraspis
T. schlegelii
FAMILY:
GAVIALIDAE
DICHOTOMOUS KEY
[German]
Adult caiman in a typical floating posture at the water surface. Crocodilians can lay motionless in this neutrally-bouyant position, with front and rear legs extended to prevent rolling. The ingestion of gastroliths - small stones or other objects - may affect this bouyancy, although the stones may also have a role in grinding up food.
Photograph courtesy of Jules Ehrstein
