This week I've had two reports of our Lesser Black-backed Gulls known to be in Guernsey this summer which are already back in Portugal. Perhaps the more surprising is Black 9AJ7, which was ringed as an adult female in May 2012 at Chouet Landfill, and which has a number of observations in Guernsey in the spring and summers of 2013 and 2014. This bird must have been either a non-breeder or a failed breeder in Guernsey this year. After last being recorded in Guernsey this year on 19 April, this gull was seen by Pedro Moreira at Vagueira Beach, Portugal on 20 June.
The other gull is Black 2CK7, ringed as a 3rd calendar year male in May 2014 at Chouet landfill, and seen near Porto, Portugal today. You can see from Inocencio Oliveira's fine photo that this is one of the many immature birds caught at Chouet this May which had very worn plumage...but this clearly did not impair its return migration only a month after ringing.
LBBG B2CK7 back in Portugal, after a very brief early summer visit to Guernsey (c) Inocencio Oliveira
The (Known) Migrations of LBBG B9AJ7