Red tegu

As hatchlings, most red tegus display little, if any, red coloration. The red tegu grows rapidly, typically reaching maturity in two to three years. It is not uncommon for well-fed juveniles to experience growth spurts of more than an inch per week. They are typically brownish-green with black strips across their width and several broken white stripes down their length. They develop red coloration as they mature; males are usually brighter than females.[4][5] Adult females can reach 91 cm (just under 3 ft) in length. Males are significantly larger, reaching up to 140 cm (4.5 ft) and developing large jowls.

In the wild, red tegus are diurnal and terrestrial. Living in a temperate climate in Argentina, they brumate in the winter, burying themselves and remaining largely dormant during the coldest periods, in some areas for up to seven months. They also burrow as a matter of habit at other times of year. In the ecotone between the arid Chaco and the Espinal of central Argentina they are known to naturally hybridise with the Argentine black and white tegu (Salvator merianae) with a stable hybrid zone.[6]

A pre-adult male tegu drinking water from a cat dish inside a house

These reptiles are common in the exotic pet trade due to their mostly docile nature. Red tegus in captivity can be known to live up to 15-20 years. They can be trained with clickers and are known for following their owners around the house "like a dog". MacGyver the Lizard is a famous YouTube channel focused on one such red tegu.