The breeding status of the Ring Ouzel Turdus torquatus in the UK in 1999 |
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| Authors: | SR Wotton RHW Langston RD Gregory |
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| Institution: | 1. Department of Avian Ecology , Wroc?aw University , Sienkiewicza 21 , 50 335 Wroc?aw , Poland tomwes@biol.uni.wroc.pl;3. Department of Forest Protection and Ecology , SGGW , Nowoursynowska 159 , 02 776 Warszawa , Poland;4. Department of Avian Ecology , Wroc?aw University , Sienkiewicza 21 , 50 335 Wroc?aw , Poland |
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| Abstract: | Capsule The first co-ordinated census of breeding Ring Ouzels across the UK reports a minimum of 6157 (95% CI, 3586–9372) and a maximum of 7549 (95% CI, 4459–11197) territories. Aims To set a baseline for the future monitoring of breeding Ring Ouzels and to provide a systematically based estimate of the population size. Methods A random sample of tetrads (2 × 2 km squares) was surveyed from the known breeding range (as defined from the two national breeding bird atlases of 1968–72 and 1988–91). The survey method used tape playback and observation and involved walking four parallel transects in each tetrad. Results Tape playback accounted for one-third of the territories located. Of the tetrads surveyed that were known to be occupied during the 1988–91 breeding bird atlas, 39–43% were unoccupied in 1999. Conclusion The survey highlights a continuing contraction in range. |
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| Keywords: | Turdus |
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