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Tokay Gecko

“The tokay gecko is the most vicious lizard in the exhibit,” says Shedd aquarist James Clark as he sends collection manager Mark Schick behind the scenes to demonstrate.

Schick opens the habitat door and dutifully sticks his hand in. With a flash of red tongue and a squawking bark, the tokay explodes out of nowhere. Schick’s reflexes are good enough that he comes back unscathed — this time.

“We get more bites from the tokay than from any other lizard” during daily maintenance in Lizards and the Komodo King special exhibit, Clark says. “He’ll charge anything. And he has a strong bite. He draws blood.”

Despite that, tokays represent one side of one of the few mutually beneficial relationships between reptiles and humans.

In their native Southeast Asia, the foot-long lizards’ primary habitat is in and around houses, where their voracious appetites make them super-efficient exterminators of crickets, cockroaches, small rodents and even other gecko species. Once a tokay sets up housekeeping in a nook or cranny of the house, however, it will defend its space aggressively against trespassers, including the homeowner.

Happily, tokays are nocturnal, so a time-share arrangement usually works out.


 

 
DID YOU KNOW?
Stick-to-it-iveness

The ridges on geckos' toe pads, called lamellae, are covered with microscopic hairlike structures called setae, which are divided into even tinier structures that interact at the molecular level with any surface, from tree bark to glass, to give geckos their gravity-defying grip. The dry adhesion between setae and surface is called the van der Waals force. If threatened, a gecko can instantly release its grip to escape — no small feat given its millions of setae.

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