Black & White Tegu
(Salvator merianae)
The Black and White Tegu, also known as the Argentine Black and White Tegu, is a large, intelligent lizard native to South America. Found primarily in Argentina, Brazil, Paraguay, and Uruguay, this species thrives in a variety of habitats, including tropical forests, savannas, and grasslands. Known for their striking black and white banded pattern and powerful build, tegus are among the largest lizards in the Americas, with adults reaching up to 4.5 feet in length. They are omnivores, feeding on a wide range of foods such as fruits, insects, small animals, and eggs. Black and White Tegus are highly adaptable and have even become invasive in parts of the southeastern United States. They are also popular in the pet trade due to their docile nature and high intelligence, often being described as “dog-like” for their ability to bond with keepers and learn routines.
UCN Status: Least Concern (LC)
Note: Although not currently threatened, they face habitat loss and are invasive in some areas like the southeastern U.S.
Range: Native to eastern and central South America, primarily Argentina, Brazil, Paraguay, and Uruguay. Invasive populations are now established in parts of Florida and Georgia.
Habitat: Tropical rainforests, savannas, dry shrublands, and grasslands. They prefer areas with access to water and cover, often near forest edges or open fields.
Lifespan: 10–15 years in the wild; up to 20 years in captivity with proper care.
Size: Adults typically reach 3 to 4.5 feet (91 to 137 cm) in total length, with males being larger than females.
Diet: Omnivorous – eats fruits, vegetables, insects, eggs, small mammals, birds, and carrion. Diet changes with age and season.
Clutch Size: Typically 20–35 eggs per clutch.
Incubation: Approximately 60–90 days, depending on temperature and humidity conditions.
The Warm Blooded Reptile
The Black and White Tegu is covered in tough, bead-like scales that provide protection and help reduce water loss—an important feature for survival in a variety of environments. Like most reptiles, tegus are ectothermic (cold-blooded), meaning they rely on external heat sources like the sun to regulate their body temperature. However, what makes the tegu truly fascinating is its ability to temporarily raise its body temperature during the breeding season (seasonal endothermy), a trait more typical of endothermic (warm-blooded) animals. This unique ability allows the tegu to remain more active during cooler temperatures, especially when preparing to reproduce. The tegu highlights the brilliance of God’s handiwork, revealing the thoughtful and precise engineering seen throughout creation.
Jacobson’s Organ
The Jacobson’s organ, also known as the vomeronasal organ, is an incredible sensory structure that God designed in the tegu and many other reptiles. Located in the roof of the mouth, this specialized organ allows the tegu to “smell” with its tongue by collecting scent particles from the air and delivering them to the organ for analysis. This system helps the tegu track prey, locate mates, and stay aware of its surroundings with amazing precision. The Jacobson’s organ is just one more example of the intricate and purposeful design found in creation. It reflects the creativity and wisdom of our Creator, who equipped each creature with exactly what it needs to thrive in its environment. Rather than being the result of random chance, this remarkable ability points to intentional craftsmanship and a world filled with evidence of God’s handiwork.