There appears to have been a bit of an influx of Willow Warblers which has supplemented the locally bred birds and resulted in a good number being caught. This influx of Willow Warblers has coincided with arrivals on Bardsey Island over the same period and suggests there has been a large scale movement down the west coast. Willow Warblers have declined markedly in recent years and have been outnumbered by Chiffchaffs in the ringing totals for quite a few years now so it is good to see them show some signs of a resurgence. Evidence of migration also came in the form of a Reed Warbler which was well away from the nearest breeding habitat along with 2 adult Garden Warblers which were similarly on the move.
|A freshly moulted adult Willow Warbler (left) and juvenile right showing the difference in the colour of the underparts. Adults are generally much whiter below whereas juveniles have extensive lemon yellow underparts.|
|Juvenile Reed Warbler 26/07/14|
|Adult Garden Warbler 26/07/14.|
|Garden Warblers don't breed at any of my ringing sites and only occur as a|
scarce and less than annual passage migrant.
There were roughly between 100 and 300 Swallows using the roost but some birds only dropped in late and from some height making numbers hard to gauge. These late arrivals were presumably birds that had been on the move and were looking for a roost to join. At the other end of the scale in terms of numbers I am still catching the odd wandering juvenile Willow Tit with another ringed this morning. All in all it has been a very interesting and productive few days especially when you consider that I only used 2 nets for each session.
Ringing Totals 24th to 26th July (retraps in brackets).
Willow Warbler 32 (3)
Chiffchaff 10 (1)
Garden Warbler 2
Reed Warbler 1
Linnet 8 (1)
Reed Bunting 2
Long-tailed Tit 2
Great Tit 1
Willow Tit 1
Total 151 (5)