Physignathus, commonly known as water dragons, are semi-aquatic lizards native to Southeast Asia and Australia. They are identifiable by their vibrant green skin, long tails, and a distinctive dorsal crest. Water dragons are excellent swimmers and climbers, often found near rivers and streams where they hunt for insects and small vertebrates.

The genus Physignathus, commonly known as water dragons, is native to Southeast Asia and Australia. The most well-known species, the Chinese water dragon (Physignathus cocincinus), is primarily found in the southern regions of China, Vietnam, Laos, Cambodia, Thailand, and Myanmar. The Australian water dragon (Intellagama lesueurii), previously classified under the genus Physignathus, is found along the eastern coast of Australia from Victoria to Queensland.

Water dragons typically inhabit tropical and subtropical forests, often near rivers, lakes, and streams. These environments provide the humidity and water sources that are crucial for their survival. The climate in these regions is generally warm and humid, with dense vegetation providing both food sources and cover from predators.

Water dragons are semi-aquatic lizards that occupy both arboreal and terrestrial niches. They are adept swimmers and often bask on tree branches or rocks near water. Their diet consists mainly of insects, small mammals, and vegetation, allowing them to play a role in controlling insect populations and seed dispersal. Their ability to thrive both in trees and on the ground enables them to exploit a variety of food sources and habitats.