Philippine Sailfin Dragon
Hydrosaurus pustulatus (Eschscholtz, 1829)
Range: Philippines
Habitat: Tropical Rainforest, Mountain Streams
Diet: Leaves, Fruits, Insects, Crustaceans
Social Grouping: Males are Territorial
Reproduction: Females breed once yearly, but may lay multiple clutches per season. Each clutch of 2-8 eggs is buried in a shallow hole near the water. Incubation is approximately 2 months; hatchlings receive no parental care.
Lifespan: 20 Years
Conservation Status: IUCN Vulnerable
- Body length 80-100 centimeters. Females are typically one-third smaller than males
- Scales are mottled green-gray, with a well-developed crest of spiny scales running from the neck down the back. As males age, they can take on a violet-blue color, thought to help in attracting mates
- Adult males possess a fin of skin (the namesake sail) at the base of the tail, standing up to 8 centimeters high. It is thought to assist in territorial displays, as well as possible in thermoregulation and swimming
- Like the Neotropical basilisks (which they closely resemble, but are distantly related to), sailfin dragons have the ability to briefly run across the surface of the water, especially younger, lighter individuals
- Excellent swimmers, take to the water to escape predators such snakes. Can stay submerged for up to 15 minutes. Often rest in trees overhanging water so they may jump to safety
- Primary threat is habitat loss; also collected for the pet trade
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