Tuesday, 20 August 2013

5 kms short of a very long way for a Dipper!

Just had the most recent batch of recoveries from BTO HQ. Not a lot of great interest but unusually it is two Dipper recoveries that stand out. Firstly one ringed in April 2011 on the Onny in Shropshire, between Craven Arms and Bishop's Castle, was retrapped by D. J. Cooksey on 19th June 2013 at Pontllanfraith, Caerphilly, South Wales. British Dippers are usually fairly sedentary and at 95 kms this is getting on for twice my previous longest movement (58 kms from Newcastle-on-Clun to Talybont) out of just over 4,000 ringed so far. In fact there have only ever been two movements in excess of 100 kms recorded by British-ringed Dippers. A bird from Strathclyde to Tayside  (116 kms) in 1989 and one from Norfolk to Suffolk (105 kms) in 1991. The latter bird was known to be a continental "black-bellied" Dipper so doesn't really count!  There's lovely.

Ringing location in Green and recovery location in Red

The second bird was ringed on the same river, near Wentnor, in April 2006 and was controlled a more normal distance of 12 kms away in June 2013 by Gareth Richardson. At 7 years and 2 months old though this bird is my oldest Dipper so far and is approaching the British longevity record of 8 years 4 months and 11 days for a Dipper ringed in Cornwall in 1970 and re-trapped 40 kms away in Devon in 1978. Hopefully Gareth will go back and catch it again for us next autumn!

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