Auteur(s): Van Den Brink, V; Schroeder, J; Both, C; Lourenco, PM; Hooijmeijer, JCEW; Piersma, T
Bron: BIRD STUDY, 55: 188-193, Part 2; JUL 2008
Abstract: Black-tailed Godwits first return to the nest location of the previous year, even when moving to a different nest location later that season.
Aims: To examine the use of space by Black-tailed Godwits during the two months before egg-laying to two weeks afterwards.
Methods: We compare the spatial distribution of sightings of eventually site-faithful birds with birds that changed nest location, and relate this to the change of the distance to their previous year's and current nest-site in the period until egg-laying. Using a log-likelihood model we establish how the differences in distance to the respective nests change over the course of the season.
Results: All birds were observed first near their previous year's nest-site, and remained there for most of the pre-laying period. Birds that subsequently changed nest location made the move only about five days before egg-laying and were more wide-ranging earlier on.
Conclusion: The return to the previous nest-site suggests that a decision to move is made only after considerable time investment near the previous nest-site. This indicates that site-faithfulness in Black-tailed Godwits is conditional on experiences after return to the nesting area.
Bron: BIRD STUDY, 55: 188-193, Part 2; JUL 2008
Abstract: Black-tailed Godwits first return to the nest location of the previous year, even when moving to a different nest location later that season.
Aims: To examine the use of space by Black-tailed Godwits during the two months before egg-laying to two weeks afterwards.
Methods: We compare the spatial distribution of sightings of eventually site-faithful birds with birds that changed nest location, and relate this to the change of the distance to their previous year's and current nest-site in the period until egg-laying. Using a log-likelihood model we establish how the differences in distance to the respective nests change over the course of the season.
Results: All birds were observed first near their previous year's nest-site, and remained there for most of the pre-laying period. Birds that subsequently changed nest location made the move only about five days before egg-laying and were more wide-ranging earlier on.
Conclusion: The return to the previous nest-site suggests that a decision to move is made only after considerable time investment near the previous nest-site. This indicates that site-faithfulness in Black-tailed Godwits is conditional on experiences after return to the nesting area.
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