AVIS-IBIS

Birds of Indian Subcontinent

The distribution, numbers and breeding ecology of Twite Acanthis flavirostris in the south Pennines of England

Publication Type:Journal Article
Year of Publication:1995
Authors:Brown, AF, Crick, HQP, A, SR
Journal:Bird Study
Volume:42
Date Published:1995
ISBN Number:0006-3657
Keywords:Acanthis, Acanthis flavirostris, Carduelis, Carduelis flavirostris, Fringillidae, Linaria, Linaria flavirostris, United Kingdom
Abstract:This study used the results of a systematic upland bird survey conducted in 1990 and the information held on BTO nest record cards to study the distribution, numbers and breeding ecology of Twite Acanthis flavirostris in the south Pennines of England. The survey estimated the size of the population as between 200 and 400 pairs. The distribution of records obtained during the survey is mapped. In the breeding season, Twite show an association with relatively low-altitude sites at the moorland edge, especially where the length of reservoir or river shore tends to be large and the sward height exceeds 5 cm. They apparently avoid areas dominated by Juncus? spp. flush vegetation. We compare information available on BTO nest record cards for south Pennines Twite with those from Scotland. Breeding performance for Twite nesting in heather-dominated habitats was better than for those nesting on either grassdominated or other moorland habitat. Twite brood-size in the south Pennines has declined in recent years and nest failure rates have apparently increased. This may indicate that, through reduced recruitment, a decline in the size of the breeding population is likely. Current upland management practices may not be ideal for maintaining breeding Twite in Britain.This study used the results of a systematic upland bird survey conducted in 1990 and the information held on BTO nest record cards to study the distribution, numbers and breeding ecology of Twite Acanthis flavirostris in the south Pennines of England. The survey estimated the size of the population as between 200 and 400 pairs. The distribution of records obtained during the survey is mapped. In the breeding season, Twite show an association with relatively low-altitude sites at the moorland edge, especially where the length of reservoir or river shore tends to be large and the sward height exceeds 5 cm. They apparently avoid areas dominated by Juncus? spp. flush vegetation. We compare information available on BTO nest record cards for south Pennines Twite with those from Scotland. Breeding performance for Twite nesting in heather-dominated habitats was better than for those nesting on either grassdominated or other moorland habitat. Twite brood-size in the south Pennines has declined in recent years and nest failure rates have apparently increased. This may indicate that, through reduced recruitment, a decline in the size of the breeding population is likely. Current upland management practices may not be ideal for maintaining breeding Twite in Britain.
URL:http://www.tandfonline.com/doi/abs/10.1080/00063659509477157
Scratchpads developed and conceived by (alphabetical): Ed Baker, Katherine Bouton Alice Heaton Dimitris Koureas, Laurence Livermore, Dave Roberts, Simon Rycroft, Ben Scott, Vince Smith