Comments: Primarily pelagic (AOU 1983). Inshore species that often feeds over lagoons or coastal ponds (Pratt et al. 1987). Forages at sea, usually fairly close to breeding islands but sometimes many miles out (Stiles and Skutch 1989). Nests on rocky sea cliff or on island in tree or shrub (horizontal limb of tall open tree in Costa Rica; Stiles and Skutch 1989).