The Nile monitor is Africa’s largest lizard and one of the most predatorily versatile reptiles on the continent, equally adept at hunting in water, on land, and up trees. Unlike most reptiles, varanids have a forked tongue and vomeronasal organ system equivalent to snakes, giving them highly developed chemosensory tracking abilities. Nile monitors also possess a more developed cardiovascular and respiratory system than other lizards — with a partially divided heart and a unique air sac system — giving them stamina and an activity endurance far exceeding typical reptiles.
About the Monitor Lizard
Varanus niloticus
Advertisement
⚡ Speed Comparison
📸 Photo Gallery
💡 Fun Facts
01
Nile monitors and their relatives have the most mammal-like cardiovascular system of any reptile — a functionally four-chambered heart that maintains higher blood pressure during activity, enabling sustained aerobic exercise.
02
Monitor lizards use their forked tongue to collect scent particles and transfer them to a vomeronasal organ in the roof of the mouth, essentially 'tasting the air' with stereo chemical detection.
03
Nile monitors raid Nile crocodile nests, digging up eggs to eat them — they are one of the few animals that regularly and successfully steal from crocodiles without being eaten.
04
Female Nile monitors lay their eggs inside termite mounds, which maintain near-perfect temperature and humidity for incubation and which the hard-working termites continuously repair around the eggs.
05
Invasive Nile monitors in Florida (escaped pets) have established breeding populations and are implicated in significant declines of native burrowing owls, gopher tortoises, and ground-nesting birds.
📍 Where to Find This Animal
Habitat Types:
Tropical Forest, River Banks, Savanna
🛒 Monitor Lizard Related Gear
As an Amazon Associate we earn from qualifying purchases.
Join the Conversation
Share your thoughts about the Monitor Lizard