Production of smoothed population trends when a key year of data is missing.

Yellowhammer, by Liz Cutting / BTO

Author(s): Noble, D.G. & Gillings, S.

Published: April 2023   Issue No.: 748

Publisher: British Trust for Ornithology Pages: 12pp

ISBN: 9781912642434

Download article 3.25 MB application/pdf

Prompted by the impact of Covid lockdown on fieldwork activity in 2020, this report assesses the impact on the direction and statistical confidence in the trends when a key year of Breeding Bird Survey data is missing.
Research Report 748 Noble & Gillings cover
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