“…After fledging, most juvenile Sooty Terns are not recorded in breeding colonies until they return to breed, generally when four to eight years old (Harrington 1974, Schreiber et al 2002. During their absence from breeding colonies they are believed to remain at sea, flying continuously as their poor feather waterproofing does not allow them to settle on water (Ashmole 1963, Johnston 1979, Schreiber et al 2002.…”