The crocodile tegu is a largely aquatic, 2 foot long, Amazonian species.
Kayaking the shallows of the Rio Orosa, a beautiful river in Amazonian Peru, whether by day or night, was always a pleasurable and sometimes an exciting pastime. Finding birds and an occasional caiman, with the possibility of finding such taxa as caiman lizards, anacondas, pink river dolphins, great potoos, and dozens of other taxa, or of doing a little quiet fishing, made the time spent on the water well worthwhile. And there was always the possibility of finding something just a bit different, something not really expected. That was what had happened one morning about 25 years ago. A couple of us, each in a kayak, set out shortly after sunup to check fallen trees and thickets of shrubs along the river. And we got a real surprise!

Quietly basking on one of the snags was a 2 foot long lizard that, except for the throat and the tail, appeared to be an overall bluish gray. The throat was yellow, the tail was orange dorsally and blue gray on the lower sides. This taxon was new to me in the wild, and although I was familiar with the lizard from former years it took some thought to put a name to it—Crocodile Tegu, Crocodilurus amazonicus.

Although we have found many since, the finding of that first example was surprising. I had been told by another researcher that although the taxon was well known in neighboring Brazil, they (with no reasons given) had been extirpated from Peru. That made the finding of example number one all the more memorable.