Gray's monitors are frugivorous creatures, meaning fruit is the primary staple in this animal's diet. These lizards, like other frugivores, also include some vegetation and meat in their diets. When Gray's monitors are young, these lizards primarily feed on vegetation and fruits from their tree. As they grow older, the Gray's diet includes small crustaceans, spiders, birds and crabs. The only fruits Gray's will eat are ripe and found on the forest floor. Gray's also avoid oily fruits due to the high level of chemicals which make the fruits inedible.
The breeding season for Gray's monitors usually occurs from June through September. Many Gray's males and females are long term mates with a single partner. When two males are interested in a female, they will engage in bipedal combat, meaning the two males fight each other while standing on two legs. Female Gray's usually lay up to 11 eggs each year. More than one clutch may happen during the breeding season. The most likely site for a Gray's nest are in tree hollows.
Gray's are arboreal creatures, meaning they spend most of their time in trees. These lizards sleep and nest in tropical rainforest environments. Gray's usually live on fruit-bearing trees but often descend to the ground when foraging for fruit or prey. Gray's are diurnal -- animals that are active during the day. While males tend to move throughout the day, females are only active in the morning.
Gray's are among the medium-sized monitor lizards. An adult's length ranges from 2 to 3 feet. Due to their size, Gray's use a tree's heavy thickets and branches when seeking shelter from larger predators such as komodo dragons. These lizards will also use their skin coloration as camouflage. If Gray's lizards need to make a quick escape, they are able to squeeze through tight crevices within trees. Gray's rarely confront other animals, unless they are males vying for a female's attention.