Papers

Papers

BTO publishes peer-reviewed papers in a wide range of scientific journals, both independently and with our partners. If you are unable to access a scientific paper by a BTO author, please contact us.

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Changing migration patterns of the Short-eared Owl Asio flammeus in Europe: an analysis of ringing recoveries

Author: Calladine, J., du Feu, C. & du Feu, R.

Published: 2012

Analyses of almost 500 ringing recoveries spanning nearly a century show marked spatial and temporal differences in the migration patterns of Short-eared Owls (Asio flammeus) in Europe. Despite several spectacular sightings in recent months, this species is a candidate for red-listing (based on marked range contractions apparent from the Atlas).

01.01.12

Papers

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The importance of altitude and aspect for breeding Whinchat Saxicola rubetra in the uplands: Limitations of the uplands as a refuge for a declining, formerly widespread species?

Author: Calladine, J. & Bray, J.

Published: 2012

Like several species, the Whinchat Saxicola rubetra, was once common across lowland Europe, but has suffered substantial declines in recent decades as agricultural practices have intensified. Populations are now increasingly concentrated in more upland areas, where agriculture is of a lower intensity, but where environmental constraints, such as low ambient temperatures, may limit habitat suitability.

01.01.12

Papers Bird Study

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