norvegicus (Berkenhout, 1769), Felis catus Linnaeus, 1758) are known to prey on WTTB eggs and chicks and are a threat to nests on the main island of the Fernando de Noronha archipelago.
The former is the largest colony of WTTBs in the South Atlantic outside of the Caribbean sea with the species less abundant on the Abrolhos archipelago (Schulz-Neto, 2004).
As in other seabirds, the breeding cycle, breeding site selection and nest location of WTTBs are influenced by climate, food availability, density and other biotic an abiotic factors (Phillips, 1987; Ramos et al.
Reproduction of WTTBs in the Fernando de Noronha archipelago was monitored between August 2011 and January 2012.
For WTTBs, breeding success has been observed to be affected by nest abandonment, intraspecific combats and predation by rats (Rattus rattus (Linnaeus, 1758) (Garnett and Crowley, 2000; Sarmento et al.