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Advisor(s)
Abstract(s)
Current knowledge concerning between-year winter site fidelity in passerines
suggests there might be important inter-specific and regional variations
in recurrence rates (the proportion of birds recaptured in years subsequent
to marking). However, there are virtually no studies reporting low
recurrence rates that show this not to be simply the result of low recapture
probabilities. This problem can be particularly acute for partly nomadic and
mostly non-territorial species in their winter quarters. The present study
shows that, in spite of the apparently nomadic behaviour of wintering
Chiffchaffs Phylloscopus collybita, some individuals can become temporarily
sedentary. Temporarily sedentary Chiffchaffs have very small linear
home-ranges (ca. 200m) and their calculated recapture probability (by
re-sighting of colour-ringed birds) is high. In spite of that, recurrence rate
of temporarily sedentary birds is very low, suggesting that the majority of
the surviving individuals are not site faithful. This is in contrast to what has
been found in several detailed studies in other Sylviidae and also Parulidae
involving mostly territorial birds. The type of approach developed here
should be used in other studies before any comparisons and generalisations
involving winter-site fidelity results are attempted.
Description
Keywords
Phylloscopus collybita Winter Site-fidelity
Citation
Ardea, 91 (2), 213-220
Publisher
Netherlands Ornithologists’ Union