About Salvator rufescens (Günther, 1871)
This species, the red tegu (Salvator rufescens), has distinct physical traits that change as it matures. As hatchlings, most red tegus show little to no red coloration. This species grows rapidly, and typically reaches maturity between two and three years of age. Well-fed juveniles commonly experience growth spurts of more than one inch per week. Adult red tegus are typically brownish-green, with black strips running across their body width and several broken white stripes running along their body length. Red coloration develops as the lizards mature, and males usually have brighter red coloration than females. Adult females can reach 91 cm, or just under 3 feet, in total length. Males are significantly larger, growing up to 140 cm, or 4.5 feet, in length, and they develop large jowls as adults. Red tegus serve as valuable model organisms for research in the field of reproductive biology. A 2016 study found that male red tegus experience a seasonal trade-off between energy invested in secondary sexual traits such as enlarged jaw muscles used for mate competition, and investment in post-copulatory sperm characteristics.
