The UK Overseas Territories of Anguilla and the British Virgin Islands are located in the north-west Lesser Antilles. Whilst mainland Anguilla lacks any large breeding seabird populations, its offshore cays excel in this area and are home to five globally and 12 regionally important populations. Four of Anguilla’s seven offshore cays are already designated as terrestrial important bird areas (IBAs) due to their important seabird colonies, with Dog Island being the second most important site for breeding seabirds in the region.