AVIS-IBIS

Birds of Indian Subcontinent

Bird ringing in Britain and Ireland in 2002

Publication Type:Journal Article
Year of Publication:2003
Authors:Clark, JA, Robinson, RA, Balmer, DE, Blackburn, JR, Griffin, BM, ADAMS, SUEY, Collier, MP, Grantham, MJ
Journal:Ringing & Migration
Volume:21
Issue:4
Date Published:2003
ISBN Number:0307-8698
Keywords:Ireland, Passer domesticus, Sturnidae, Sturnus, Sturnus vulgaris, United Kingdom
Abstract:This is the 66th annual report of the British Trust for Ornithology's Ringing Scheme covering work carried out and data received in 2002. The BTO continues to work to understand the causes of bird population declines. During the year a major report on the demography of House Sparrows? and Starlings was completed. The work showed that while the decline in House Sparrows is likely to be due to a decline in the survival rate of first?year birds, changes in productivity (the number of young birds entering the population) appear to have helped to halt the decline in recent years. For Starlings, changes in survival of first?year birds was the best way of explaining the population decline, although changes in adult survival rate may also be implicated in eastern Britain. Work on wader age ratios showed that the proportion of juvenile waders in flocks caught in winter in Britain those selected for inclusion confirm known breeding or wintering areas or migration routes and also show a number of significant or unusual movements.This is the 66th annual report of the British Trust for Ornithology's Ringing Scheme covering work carried out and data received in 2002. The BTO continues to work to understand the causes of bird population declines. During the year a major report on the demography of House Sparrows? and Starlings was completed. The work showed that while the decline in House Sparrows is likely to be due to a decline in the survival rate of first?year birds, changes in productivity (the number of young birds entering the population) appear to have helped to halt the decline in recent years. For Starlings, changes in survival of first?year birds was the best way of explaining the population decline, although changes in adult survival rate may also be implicated in eastern Britain. Work on wader age ratios showed that the proportion of juvenile waders in flocks caught in winter in Britain those selected for inclusion confirm known breeding or wintering areas or migration routes and also show a number of significant or unusual movements.
URL:http://dx.doi.org/10.1080/03078698.2003.9674299
Short Title:Ringing & Migration
Scratchpads developed and conceived by (alphabetical): Ed Baker, Katherine Bouton Alice Heaton Dimitris Koureas, Laurence Livermore, Dave Roberts, Simon Rycroft, Ben Scott, Vince Smith