Records of Brown Booby Sula leucogaster in the Pitcairn Islands with additional observations during 2015–19

The Pitcairn Islands are a UK Overseas Territory comprising four islands (Oeno, Pitcairn, Henderson and Ducie) spanning >600 km in eastern Polynesia, in the South Pacific Ocean. Oeno and Ducie are low coral atolls, Henderson is a large raised coral island, and Pitcairn is volcanic in origin.

The islands’ avifauna have received considerable scientific attention, mainly focused on Henderson Island, beginning in the early 20th century, followed by the Whitney South Seas Expedition. There was some work in the late 1980s on Henderson’s landbirds. The Sir Peter Scott Memorial Expedition in 1991–92 stationed researchers on Henderson Island for more than a year, and thoroughly studied the birds.