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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The head of a leucistic adult alligator, similar in appearance to an albino (lack of melanin pigment) but where some pigment is retained - in this case in the blue iris. This particular animal has survived in captivity, but is kept indoors to protect it from harmful UV radiation. Leucistic or albino animals rarely survive under natural conditions.

Photograph © Adam Britton

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