Five years of conserving the 'world's rarest snake', the Antiguan racer Alsophis antiguae

The Critically Endangered Antiguan racer Alsophis antiguae is confined to G reat Bird Island, a 9.9-ha (24.5-acre) islet off the north-east coast of An tigua in the Lesser Antilles. This island represents weil under 0.1 per cen t of the species's historical distribution range. During the past 5 years, the total number of: racers aged 1 year or more has fluctuated between 51 a nd 114, and currently stands at approximately 80. Since 1995, the Antiguan Racer Conservation Project (ARCP) has endeavoured to save this harmless sna ke from extinction by using a combination of education, conservation breedi ng, habitat restoration, local capacity building and applied research. The Antiguan racer's ecology and population dynamics have become well understoo d after 5 years of intensive study, and the species has evidently benefited from the project's rat eradication programme. The snakes are still serious ly threatened by other intrinsic and extrinsic factors, however, including inbreeding depression, frequent hurricanes, invasive predators and delibera te killing by toruists, as well as the problem that Great Bird island is to o small to support more than about 100 individuals. This paper describes th e activities and impact of this project to date, and outlines a series of c onservation activities to safeguard the long-term future of the species, wh ich include reintroduction of the Antiguan racer to restored islands within its former distribution range.