The Brown Tree Snake (Boiga irregularis) is a nocturnal, arboreal species native to Australia, Papua New Guinea, and the Solomon Islands. It exhibits a slender body, typically brown with irregular banding, and reaches lengths up to 3 meters. Known for its invasive nature, particularly in Guam, it preys on birds, lizards, and small mammals.

The Boiga irregularis, commonly known as the Brown Tree Snake, is native to the northeastern coast of Australia, Papua New Guinea, and several islands in northwestern Melanesia.

This species predominantly inhabits tropical and subtropical environments. It is commonly found in humid, forested areas, including rainforests, woodlands, and mangroves. The climate in these regions is typically warm with high humidity and significant rainfall, providing a lush environment with dense vegetation.

Boiga irregularis is an arboreal snake, primarily active at night (nocturnal), and often resides in trees or shrubs. It occupies a niche as both a predator and a prey species within its ecosystem. It primarily feeds on birds, lizards, and small mammals, employing its rear-fanged venom to subdue prey. The species is known for its climbing abilities, which it uses to hunt and evade predators.