A very brief update on Sand Martins. It looks like the first brood or two of Juveniles are well on the way south as we had no retrap juveniles from previous sessions last night although about 70 retrap adults. The highlights from the last couple of nights have been:
N 3J New Bird 21/06/10 R Lune, Whittington (NOR), Lancashire
C 3 Recaptured 03/08/10 Tour aux Moutons, Loire-Atlantique, France (764 km, S, 43 days)
C 4M Recaptured 25/07/11 Nether Burrow, Lancashire (2 km, S, 1 yr 34days)
X836637 - appears to be the 5th Control from Wintersett Reservoir this year, following on from 3 last year.
This series of 8 movements is very interesting. Wintersett is in effect on the other side of the Pennines and for most summer migrants not an obvious route south. The Pennine rivers do provide excellent breeding habitat for Sand Martin so I would guess these birds are in their wandering phase in June/July when caught in West Yorkshire.