NLRG was formed in 1957 to help in the study of birds in the Lancaster and District Birdwatching Society area. There are currently 12 active ringers. Species currently being studied include: Pied Flycatcher, Bearded Tit, Sand Martin, Twite, Goosander, Oystercatcher and Grey Wagtail. Migration has been studied for 28 years at Heysham. We welcome anyone who wants to observe, help or perhaps wish to become a ringer. Photo: A Heysham-ringed Twite on the Mull of Kintyre (thanks to Eddie Maguire)

Sunday, 17 August 2014

Sedge Warblers Remain Scarce

I blogged before about the small numbers of Sedge Warbles we are catching this year. August is usually the best month for both Sedge and Reed Warblers but this August the weather has done us no favors. However on the six mornings of suitable weather this month we have only caught  33 Sedge Warblers  compared to 160 Reed Warblers. Usually we would expect to catch  in a ratio of 2 to 1 in favour of Reed Warblers.

In our cath on Augut 15h at Leighton Moss RSPB we  caught a female and a juvenile from a small party of Bearded Tits- the others went past the end of the nets. The Juvenile had a dark  iris suggesting that it was recently fledged and was still in juvenile plumage with no sign of moult. The adult female had just started to moult with 8 old feathers suggesting that it had  a brood  that had fledged  probably in early August. Bearded Tits can have three broods per season and on occasions we have caught birds still in juvenile plumage as late as Oct 6th.

1 comment:

Pete Marsh said...

The sedge warblers left very early at Middleton/Heysham in the fine July weather and there have not been any influxes of any size since. Quite a contrast to Whitethroat where ringing total is already an annual record at 170 with Sedge barely into three figures