Fidelity to territory, nest site and mate, survivorship, and reproduction of two sympatric Forest-Falcons

Citation
R. Thorstrom et al., Fidelity to territory, nest site and mate, survivorship, and reproduction of two sympatric Forest-Falcons, J RAPT RES, 35(2), 2001, pp. 98-106
Citations number
40
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Animal Sciences
Journal title
JOURNAL OF RAPTOR RESEARCH
ISSN journal
0892-1016 → ACNP
Volume
35
Issue
2
Year of publication
2001
Pages
98 - 106
Database
ISI
SICI code
0892-1016(200106)35:2<98:FTTNSA>2.0.ZU;2-9
Abstract
Fidelity, survivorship, and reproduction of Barred Forest-Falcons (Micrastu r ruficollis) and Collared Forest-Falcons (M. semitorquatus) were studied f rom 1988-96 at Tikal National Park. Guatemala. Forest-Falcons are year-roun d residents and nest in tree cavities. Barred Forest-Falcons and Collared F orest-Falcons had 100% fidelity to territories. Breeding pairs also had 100 % mate fidelity, with pair bonds perennial and long-lasting. Only one terri tory switch in 98 territorial years was observed during the study and that was by a widowed male to a neighboring territory with a widowed female. The rate of annual survivorship of breeding adult Barred Forest-Falcons banded in 1989 was 95.3% (N = 7 males) and 92.3% (N = 7 females). Nineteen percen t of females and males that bred produced >50% of thr offspring. Forest-Fal cons are longer lived and have a lower rate of a territory and mate switchi ng than similar-sized temperate-zone raptors such as the European Sparrowha wk (Accipiter nisus). The reproductive success of Barred Forest-Falcons dur ing this study suggested that the factors affecting lifetime reproductive s uccess in temperate and tropical species do not differ.