It has a broad bulbous head distinct from a narrow neck. The brown tree snake (Boiga irregularis) is a metre-long tree snake native to the bioregion of Wallacea. Ecological Threat. It is a rear-fanged, possessing two small, grooved fangs at the rear of the mouth It has a large mouth and rear-fangs, and will bite with little provocation and bites have caused localized pain and swelling and more serious problems with babies. The brown tree snake has decimated Guam's birds and herpetofauna, causing the local extinction of over half of Guam's native bird and lizard species as well as two out of three native bat species. Guam agriculture department aware of large brown tree snake in video The video shows the snake tucked between wood beams and tin roofing at a home. Brown Tree Snake. The venom appears to be weakly neurotoxic and possibly cytotoxic. The Brown tree snake is a nocturnal snake that can be very aggressive when confronted. The head is distinct from the narrow neck. The snakes feed on lizards, birds, small mammals, and eggs. A new way to prevent brown tree snakes from invading was unveiled yesterday by scientists working for the U.S. Department of the Interior’s U.S. Geological Survey and Ohio State University. It has a broad bulbous head distinct from a narrow neck. After World War II the snake was also introduced to the island of Guam. The Brown tree snake (Boiga irregularis) is an arboreal colubrid snake the lives in parts of coastal Australia, Papua New Guinea, and islands in northwestern Melanesia. The eyes are large with vertical cat-like pupils. Brown Tree Snake. The Brown Treesnake, An Incredible Predator. The brown treesnake is primarily nocturnal with the vertically elliptical cat-like pupils typical of such snake worldwide. The brown treesnake was accidentally introduced most likely by the US military to Guam in the late 1940s or early 1950s. The fangs are grooved rather than hollow fangs, the poison is hard to place into a bite on a human, in this way, is only given in small amount. Brown Tree Snake, Boiga irregularis, note the large eye with a vertical pupil. The Brown Tree Snake eats a wide variety of prey ranging from birds, small mammals, amphibians,and other reptiles. Accidentally introduced to Guam. They are brown above with ragged-edged, darker cross bands on the back and sides (eastern Australia). The brown tree snake of Guam is a slithering, voracious invader: a frightening nuisance for those in its path. They are venomous but the fangs are at the back of the mouth so only a very large snake would be able to inject venom into a human. Brown tree snake is a species of colubrid snake found in Australia, Indonesia, Papua New Guinea, and Melanesia. The eyes are large with vertical cat-like pupils. It often takes shelter in hollow trees, caves and in rock crevices. Identification: The Brown Tree Snake has a large head with eyes that are large and protruding with vertical pupils. Native to northeastern Australia, eastern Indonesia, and Melanesia, the brown tree snake has signifi cantly damaged the economy and ecology of Guam. The native range of brown tree snakes includes Indonesia, the Solomon Islands, northern coastal regions of Australia and New Guinea. The introduction of the brown treesnake to the Territory of Guam has caused significant ecological, economic, and human health impacts. The species is rear-fanged, arboreal, and nocturnal.