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A brown tree snake near a snake trap hanging from a fence on Guam. Believed to be a stowaway on a U.S. military transport after the end of World War II, the brown tree snake (Boiga irregularis) was accidentally introduced to Guam, which previously had no native species of snake. It nearly eliminated the native bird population.
The brown tree snake is a nocturnal and arboreal species that uses both visual and chemical cues when hunting, either in the rainforest canopy or on the ground. [3] It is a member of the subfamily Colubrinae, genus Boiga, which is a group of roughly twenty-five species that are referred to as "cat-eyed" snakes for their vertical pupils. [4]
The endemic birds of Guam, the southernmost Mariana island, were severely affected by the introduction of the brown tree snake after World War II. It has been reported that 11 of Guam's 14 terrestrial birds have become extinct or extirpated from Guam. [15]
Another bird on the list, the Bridled white-eye found in Guam, became extinct from being hunted by brown tree snakes on the island, according to the Center for Biological Diversity.
Brown Tree Snakes. mountain pine beetles, invasive species, rocky mountains, south dakota, black hills ... Despite efforts to control the pests with poison, Guam currently has an estimated 13,000 ...
>> $1.1 million for the brown tree snake rapid response. >> $800K for two-lined spittlebug control. >>$200,000 for feral chicken control, to be appropriated to each county as a grant-in-aid.
On 5 November 2020, the US Department of the Interior and the US Geological Survey announced that the brown tree snake had been found on Cocos Island. [3] The brown tree snake is an invasive species responsible for the eradication of many species of wildlife native to Guam, including birds and lizards.
The nominate subspecies Zosterops conspicillatus conspicillatus, endemic to the island of Guam, became extinct due to the introduction of the brown tree snake. The last known sighting was in 1983. [2] [3] The US Fish and Wildlife Service delisted the species from the Endangered Species Act in October 2023 citing extinction. [4]