“…The average hatching time of South American Terns in Argentina was 21.5 days (Scolaro et al 1996), in Santa Catarina 21-24 (Branco 2003b), while Cabot's Terns from Espírito Santo averaged 23 days (range 19-26) (Efe 2004), corroborating the hatching time we recorded for the small sample in our study. Many factors, such as variation in atmospheric temperature and both the direct and indirect action of predators, may change the incubation time (Nisbet & Welton 1984, Hébert 1985.…”