Résumé
Breeding phenology is a life history trait that influences reproductive success and population dynamics, yet it remains poorly studied in tropical seabird species. The Caribbean constitutes a breeding hotspot for seabirds, although information about their phenology and reproductive success is limited. We characterized the breeding phenology and reproductive success of seven larid species during the 2021 breeding season on three cays in Cuba. To document breeding phenological phases, we conducted weekly surveys and used camera traps. We also recorded the number of nests, eggs and fledglings. Overall, the breeding phenology of the studied species was seasonal and relatively synchronous, occurring primarily from May to August. The phenological pattern exhibited in this larid community may reflect increased prey availability during the rainy season in Cuba. Additionally, denser vegetation cover—resulting from higher rainfall—may offer greater protection against predators, particularly because most of the species are summer residents. Reproductive success was high (≥ 50% per pair) for Laughing Gull Leucophaeus atricilla, Sooty Tern Onychoprion fuscatus, and Roseate Tern Sterna dougallii in all cays, while Bridled Tern O. anaethetus and Royal Tern Thalasseus maximus exhibited variable reproductive performance between cays. Sandwich Tern T. sandvicensis exhibited moderate reproductive success (40%-49%). Landscape features at nesting sites appeared to strongly affect the reproductive success of both Bridled Tern and Royal Tern.