Object

Title: Nest re-use by blackbirds - the way for safe breeding?

Subtitle:

Acta Ornithologica, vol. 39, no. 2 ; Czy ponowne użytkowanie gniazd przez kosy może być sposobem unikania drapieżników?

Contributor:

Museum and Institute of Zoology, Polish Academy of Sciences

Publisher:

Museum & Institute of Zoology

Place of publishing:

Warszawa

Description:

Bibliogr. p. 168 ; P. [164]-168 ; 27 cm ; Abstarct in Polish

Abstract:

The biology of individually colour-ringed European Blackbirds inhabiting two city parks in Szczecin (NW Poland) was studied in 1997–2003. In each park one to three observers watched the behaviour of Blackbirds every other day from dawn till afternoon (6–8 h a day); in this way almost all of their nests were discovered. 35 cases were recorded where pairs re-used their own nests, as well as two cases where the nest of another Blackbird pair and one Fieldfare nest were re-used. In 33 out of 81 cases observed, the re-use occurred after the brood had been successfully reared, while in two cases out of 378, female Blackbirds initiated the second breeding attempt in the same nest after the loss of the first one. The re-used nests were better concealed (80 ± 19% and 69 ± 18%, respectively) and had been built at greater heights than those abandoned after breeding (9.0 ± 5.0 m and 6.5 ± 4.2 m, respectively). No shortening of the interval between successive clutches was noted in the case of nest re-use (re-used nests 36.8 ± 4.9 days, newly-built nests 37.7 ± 8.0). The more and more frequent re-use of nests where breeding had been successful, their better concealment and higher sites, and also the lack of any differences in the intervals between successive clutches of pairs occupying old nests and those building new ones before the next breeding attempt, suggest that in the investigated population the basic reason for nest re-use was the insufficient number of safe nesting sites.

Relation:

Acta Ornithologica

Volume:

39

Issue:

2

Start page:

164

End page:

168

Format:

text/xml

Resource Identifier:

oai:rcin.org.pl:55523 ; oai:rcin.org.pl:55523

Source:

MiIZ PAN, call no. patrz sygn. czas. P.257-39-2 ; MiIZ PAN, call no. patrz sygn. czas. P.4568-39-2 ; click here to follow the link

Language:

eng

Rights:

Rights Reserved - Free Access

Terms of use:

Copyright-protected material. May be used within the limits of statutory user freedoms

Digitizing institution:

Museum and Institute of Zoology of the Polish Academy of Sciences

Original in:

Library of the Museum and Institute of Zoology of the Polish Academy of Sciences

Projects co-financed by:

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