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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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Alligator mississippiensis

Leucistic hatchling alligator swimming at the water surface. Lack of melanin pigment in the skin of animals is a relatively rare genetic trait. Such animals are at a disadvantage due to their light colour which lacks any real camouflage and is less suitable for absorbing both heat and UV rays. Therefore, albino alligators rarely survive under natural conditions. Leucistism differs from albinism in that pigment is not entirely absent - in most cases it is retained in the eyes. (black & white photograph)

Photograph courtesy of Steve Grenard

ALL IMAGES:
[click on image for enlargement]

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





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