q6^`(��b� Mode (s) of Introduction: It is believed that the brown tree snake was introduced as a stowaway in cargo transported from the Admiralty Islands (near Papua New Guinea) by U.S. military ships during World War II. The snake was first sighted in Guam inland from the sea port and had spread across the island by 1968. ) or https:// means you’ve safely connected to the .gov website. brown tree snake, purple loosetrife, zebra muscles How was the brown tree snake a problem? ;-�Y8W5��%�0�Qa��6D�k���0�����]�mD�+��"(U�@6�� +�0QV���L���/�[·? �T�r�6������8��GY�m5�ZXT ��?��۲��j�*k`�a�p��Hn�G�* �Ey;��81�j[��R:�|�u 4���z�EQȌ��au�I�" 1992). Sniffer dogs are being used to check plane cargo for snakes to stop the species from spreading elsewhere. Synopsis -- Shortly after World War II, and before 1952, the brown tree snake was accidentally transported from its native range in the South Pacific to Guam, probably as a stowaway in ship cargo. 2002-0009, Explore recent publications by USGS authors, Browse all of Pubs Warehouse by publication type and year, Descriptions of US Geological Survey Report Series, The Brown Tree Snake on Guam: How the Arrival of One Invasive Species Damaged the Ecology, Commerce, Electrical Systems and Human Health on Guam: A Comprehensive Information Source. Secure .gov websites use HTTPS The brown treesnake was accidentally introduced most likely by the US military to Guam in the late 1940s or early 1950s. [1], The brown tree snake has also been seen in Hawaii multiple times, with 8 sightings between 1981 and 1998, although it is not thought that this species has established any breeding populations. A lock ( [3], 1 Columbia.edu Introduced Species Summary Project, 3 BBC News - "Battling the brown tree snake in Guam". [1], Brown tree snakes also cause power outages on the island by entering transformers or residual appliances or crawling on power lines. The Brown Tree Snake was accidentally introduced onto the Island of Guam back in the 1940’s/50’s where it has basically taken over the island significantly damaging the economy and natural ecology of Guam. The snakes probably arrived on Guam hidden in ship cargo from the New Guinea area, about 1100 miles to the south. As a result of abnormally abundant prey resources on Guam and the absence of natural predators and other population controls, brown tree snake populations reached unprecedented numbers. Several indigenous or endemic species of lizards in Guam have become extinct or engangered because of brown snake predation. It resulted in major ecological A .gov website belongs to an official government organization in the The snakes may then have stowed away on planes, spreading the species accross the island quickly. 2 0 obj [2], The brown tree snake was first introduced to Guam in the 1950s. Information and Technology Report introduced to the island of Guam; eradicated most of the native bird species, which had never been preyed upon by snakes and had not developed defense mechanisms The brown treesnake (Boiga irregularis) is a native of Australia, Papua New Guinea, and the Solomon Islands. �:����u��+#��6<1Dh��� xR�2��h�A,�x�i����O���t��K��;���ܼW��x-�*6�Plg� I����?���` ���-���c��=�9�,֪e� It is thought that the snake was accidentally imported to Guam on ships from the Admiralty islands (specifically Manus Island***) on US military ships during World War II. The first sightings were inland from the seaport in the early 1950s. Share sensitive information only on official, secure websites. The brown tree snake causes frequent electrical power outages by climbing power lines and getting into transformers and electrical boxes. The Guam rail and Micronesian kingfisher are both extinct (with 10 of Guam's 12 native bird species being removed from the island ([3]) ). Case Study: Brown Tree Snake. For best results viewing and printing PDF documents, it is recommended that you download There are no native species of snakes on Guam, so the Guam rail had no experience with snake predators until the brown tree snake was accidentally introduced sometime between 1944 and 1952. After World War II, the brown tree snake was accidentally introduced into Guam. More information United States. %��������� about viewing, downloading, and printing report files can be found here. The brown tree snake is native to eastern Indonesia, New Guinea, north and east coastal Australia and the Solomon Islands. the documents to your computer and open them with Adobe Reader. It builds a shallow nest on the ground and lays eggs throughout the year. As a result of abnormally abundant prey resources on Guam and the absence of natural predators and other population controls, brown tree snake populations reached unprecedented numbers. With no natural predators and abundant prey, the snake population steadily grew and spread throughout the island. [1], The brown tree snake has breeding populations in Guam. 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. [1], These snakes also occassionally kill poultry and pets and, although bites aren't fatal, the snake's venom can cause small children to fall severely ill. [1], One removal method by poisoning involves dropping acetaminophen-laced rodent carcasses out of helicopters.