Northern Caiman Lizard
Dracaena guyanensis (Daudin, 1802)
Range: Northern South America
Habitat: Wetlands, Flooded Forest
Diet: Aquatic Invertebrates (especially snails), Fish
Social Grouping: Solitary
Reproduction: Females deposit 8-10 eggs in a hole dug in the riverbank. Incubation is 5-6 months. No parental care is provided
Lifespan: 10-12 Years (Captivity)
Conservation Status: IUCN Least Concern, CITES Appendix II
- Body length is 1.2-1.5 meters (males larger than females), with a weight of 3.5-5.5 kilograms. The body is olive- or bright-green, while the head is red or orange. Males also differ from females by having broader heads
- Highly aquatic, the caiman lizard spends much of its time on branches overhanging the water; if it feels threatened, the lizard will drop into the water and swim to safety. Aquatic adaptations include a clear third-eyelid (the nictitating membrane) and a laterally flattened tail used in swimming. At night, they hide in trees or bushes
- Unlike many lizards, the tongue is bifurcated (forked), allowing the lizard to better detect prey
- Caiman lizards are considered snail-specialists, crushing the shells of their prey with their back teeth and spitting out the shells (they have been known to predate turtles in a similar manner). This specialized diet has made them a challenge for some zoos to accommodate, though captive-born hatchlings will take a wider array of foods
- The common name is a reference to their resemblance to the alligator-like caimans, especially with their dorsal scales and their manner of swimming
- While not considered aggressive, threatened caiman lizards will defend themselves with powerful bites or blows from their tail
- The species was once heavily hunted for its skin, but has been legally protected since the 1970's and is now considered to be recovering
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