Abstract
Abstract Multibrooded species that undertake more than one nesting attempt per breeding season and individuals that breed over multiple years (breeding seasons) must decide whether to return to (or remain at) their former breeding site and social mate (fidelity) or to relocate (dispersal). During three breeding seasons (1998–2000), we examined breeding-site (territory and nest) fidelity and social-mate fidelity of Eastern Phoebes (Sayornis phoebe) (n = 435 adults captured and color-banded, n = 198 males, n = 237 females) both within years and between years. We also examined the influence of sex and previous reproductive success on breeding-site and social-mate fidelity decisions. Field research was conducted at Crane Naval Surface Warfare Center, Martin County, Indiana. Breeding-site (territory and nest) and social-mate fidelity were extremely high both within and between years. Only 23 instances of breeding dispersal to new territories were documented. Within years, Eastern Phoebe adults rarely dispersed...
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