CES ringing at Gunwalloe
|Main net ride at Gunwalloe|
CES methodology involves making 12 visits to the site over the breeding season, rounghly once every 10 days. The commonest birds caught are Reed and Sedge Warbler, with good numbers of Reed Bunting and Blue Tit.
Aquatic Warbler monitoring at Marazion Marsh RSPB
The group will continue to organise and maintain the standardised autumn ringing programme at Marazion Marsh RSPB reserve. The ringing effort here forms part of a network of sites along the south coast monitoring the passage of the globally endangered Aquatic Warbler. Marazion Marsh is historically one of the most important sites in the country for these birds on passage. The main species ringed at the site are Sedge and Reed Warbler, with annual totals shown below.
|Ringing effort (days)||13||24||22|
|Sedge Warblers ringed||207||264||120|
|Reed Warblers ringed||102||135||106|
|Aquatic Warblers ringed||0||2||1|
A second Retrapping Adults for Survival (RAS) project started in 2013, focussing on the thriving population of House Sparrows at The Lizard. Use of colour-rings here allows regular monitoring of birds at a garden feeder.
One of the most exciting aspects of winter ringing in Cornwall is the monitoring of the use of Sewage Treatment Works by wintering warblers. Ringing effort is concentrated at the STWs at Carnon Downs, Ponsanooth, Gwennap and Helston. The main target species is Chiffchaff and in particular birds of the eastern races (tristis and possibly abietinus), though we do also monitor vagrant Yellow-browed Warblers.
|Eastern tristis Chiffchaff|