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You are here: Home / Associated publications / Belgian Journal of Zoology / Bibliographic References / Seasonal and annual changes in the diet of the Red-backed Shrike Lanius collurio in farmland of Eastern Poland

Artur Golawski (2007)

Seasonal and annual changes in the diet of the Red-backed Shrike Lanius collurio in farmland of Eastern Poland

BELGIAN JOURNAL OF ZOOLOGY, 137(2):215-218.

The aim of the study was to identify differences in diet composition of the Red-backed Shrike during the breeding period and between years related to habitat diversity of territories. The study was conducted in 1999-2003 in extensive farmland of Eastern Poland. The diet composition the Red-backed Shrike was analysed based on examination of animal remains in pellets found under nests and places where the birds often stayed. The material was divided into two groups: pellets collected in territories with predominantly arable land and others with predominantly grasslands (meadows and pastures). In territories with the prevalence of arable land the proportion of Hymenoptera in the Red-backed Shrike diet increased, and of Coleoptera decreased, with the progress of the season. A corresponding pattern was not observed in territories comprising grasslands. Territories of the Redbacked Shrike located in the same places in two years did not differ in the proportions of Coleoptera and Hymenoptera in a birds' diet. This can be an evidence of a food stability of Red-backed Shrike's territories in consecutive years and of dietary preferences of this species. Grasslands supported a greater abundance and variety of invertebrates in comparison with arable land. Thus, actual food preferences of Red-backed Shrikes in grassland territories could be causing the lack of a relation between season and the proportion of a given taxon in the diet. Thus, the occurrence of feeding preferences in sites of restricted feeding conditions may not entirely reflect actual food selectivity of the species.

Red-backed shrike; Lanius collurio; food; extensive farmland
BJZ

ISSN 2295-0451 (online version)
ISSN 0777-6279 (printed version)
impact factor 2015: 0,87.

Editor-in-Chief:
Prof. Dr. Isa Schön
Royal Belgian Institute of Natural Sciences
Vautierstraat 29
1000 Brussels, Belgium

 



1863-1903
Annales de la Société malacologique de Belgique
 
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​Annales de la Société royale malacologique et zoologique de Belgique
 
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Annales de la Société Royale Zoologique de Belgique
 
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Belgian Journal of Zoology