Cetti's Warbler have only recently colonised our area, mainly at Leighton Moss RSPB. Although we ringed single birds in 1995, 2007 and 2008. It was not until 2009 that we caught more than one in a year. In total we have only ringed 31 birds but three of these have been controlled elsewhere. The latest was a bird ringed at Leighton in early October 2014 and controlled presumably breeding at Woolston Eyes Cheshire in mid April 2015 a movement of 89 km south. One controlled at Middleton NR on 28th September had been ringed 68 days previously and 106 km ESE at Wintersett Reservoir in West Yorkshire. Pride of place though goes to one ringed at Leighton on 13th March 2010 and caught just over a year later at Farlington Marsh Portsmouth 389 km SSE. It was re-trapped at this site on four other occasions over the next year so was probably breeding there. This is one of the longest movements recorded within Britain.
Once established Cetti's Warblers are thought to be sedentary. But there appears to be some dispersal of young birds presumably mainly in their first summer and autumn as is shown by the Woolston Eyes and Wintersett birds detailed above , that this can continue into late winter and spring is shown by the Farlington Marsh bird.
John
No comments:
Post a Comment