Wilpattu's Reptiles: Crocodiles, Monitor Lizards, Pythons, and More

The mugger crocodile (Crocodylus palustris) is the dominant aquatic predator in Wilpattu's villus.

Identification: - Broad, blunt snout (distinct from saltwater crocodile) - Adult size: 3–4 metres (males), 2–3 metres (females) - Colour: Dark grey to brown with faint darker bands on the tail

Behaviour and hunting: - Ambush predator: Submerged with only eyes and nostrils above water - Feeding: Fish, terrapins, birds, and mammals that come to drink - Basking: Frequently observed on villu banks during morning hours

Best viewing locations: - Mahaweva villu (deep water, high crocodile density) - Lunuwewa (extensive shoreline with basking spots) - Manikwila villu (consistent sightings near the bungalow)

Naturalist's tip: Crocodiles are most visible between 7–10 AM when they emerge to bask. Count them at each villu — the number indicates the health of that water body.

The Bengal monitor lizard (Varanus bengalensis) is the most frequently observed reptile in Wilpattu.

Identification: - Adult size: 1–1.5 metres - Colour: Olive-green to brownish-grey - Tail: Long, muscular, used for balance and defence

Behaviour: - Active forager: Constantly moving through the forest floor - Diet: Insects, crabs, small mammals, birds, eggs, carrion - Climbing ability: Excellent tree climbers - Defence: Inflates body, hisses, lashes tail when threatened

Best viewing: Ubiquitous across all sectors. Most commonly seen on roadsides in the morning.

Photographers' note: Their prehistoric appearance and constant movement make fantastic subjects, especially when they climb trees.

The Indian python (Python molurus) is Wilpattu's largest snake.

Identification: - Adult size: 3–5 metres - Colour: Light brown with dark brown blotches and arrow-shaped head mark

Behaviour: - Ambush predator: Lies motionless near animal trails for days or weeks - Diet: Deer fawns, langurs, porcupines, small mammals - Activity: Mostly crepuscular and nocturnal

Best viewing: Rare. Occasionally seen crossing roads after rain or found near bungalow compounds.

Naturalist's note: Python sightings are a bonus, not an expectation. In 15 years of guiding, I have seen perhaps 30 pythons in Wilpattu — each one a privilege.

Indian softshell turtle (Nilssonia gangetica): Inhabits the villus, rarely seen basking. Can reach 60 cm shell length.

Indian star tortoise (Geochelone elegans): Terrestrial tortoise with striking star-patterned shell. Listed in CITES Appendix I.

Common vine snake (Ahaetulla nasuta): Bright green, long pointed snout, arboreal. Mildly venomous.

Russell's viper (Daboia russelii): One of Sri Lanka's 'big four' venomous snakes. Responsible for significant snakebite cases. Admire from a distance.

Water monitor vs. Bengal monitor: Water monitor (Varanus salvator) is larger (2–3 m), more aquatic, with distinctive yellow tongue. Less common than Bengal monitor.

General reptile etiquette: Do not approach, touch, or harass any reptile. Most will retreat if given space. If they do not retreat, you are too close.