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

G. gangeticus

DICHOTOMOUS KEY
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Large adult alligators can exceed 4 metres in length, although it takes many years for an animal to approach 5 or 6 metres. This photograph shows the way the broad upper jaw covers the teeth in the lower jaw, making the teeth much harder to see than in true crocodiles or the gharial.

Photograph courtesy of Julie Ehrstein

ALL IMAGES:
[click on image for enlargement]

	Alligator habitat in Florida Everglades		Basking alligator on grass		Drawing of adult alligator
	Alligator on grass behind tree		Sub-adult basking on floating log		Leucistic hatchling (b&w)
	Head of large adult		Head of swimming adult		Front view of adult asleep on sand
	Adult floating in water		Sub-adult basking on floating log		Head silhouette in water
	Leucistic adult alligator		Dorsal view of elongated alligator head		Top-down view of sub-adult alligator
	Tightly-packed sub-adults in water		Close-up of juvenile alligator eye		Close-up of juvenile alligator head