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Arca

Asian water monitor

Varanus salvator

Conservation status IUCN: Least concern· LC
Asian water monitor (Varanus salvator)
Photograph from Wikimedia Commons · Wikipedia article (it)

Where the name comes from

Salvator means “saviour”, and not even taxonomists can say for certain why Laurenti chose it in 1768: perhaps for a reputation that these animals had saved somebody by signalling danger — once again the idea of the sentinel lizard. It is the second heaviest land reptile in the world after the Komodo dragon, and it lives in cities.

Facts

Group
Reptiles · Reptilia
Order
Squamates
Habitat
Mangroves, rivers, urban canals, rice fields, coastal forest
Range
From Sri Lanka to Indonesia and the Philippines
Size
1.5–2.5 m, up to 3 m; 20–25 kg
Diet
Fish, crabs, birds, rodents, carrion, refuse
Lifespan
15 years

Characteristics

  • 01

    It swims in canals and crosses arms of sea between islands.

  • 02

    It escapes by climbing trees, even as an adult.

  • 03

    Its forked tongue lets it taste the air the way snakes do.

What sets it apart

There are hundreds of them inside Lumphini Park in central Bangkok, and the city has made its peace with them: they are the canals’ carcass-disposal service. Every so often, when they get too numerous, the authorities move a few dozen to protected areas, with press conferences and arguments. It is one of very few large predators to have colonised a metropolis without being exterminated, and the reason is that they do a useful job and bother nobody.

Next species

Argentine black and white tegu

Salvator merianae