This is the UK400 Club Rare Bird Alert highlighting all records of avian interest and published in association with Rare Bird Alert Pagers and utilising additional information gleaned from the Regional Birdlines, BirdGuides, local email groups and individual observers
Monday 27 September 2010
Detail on the Empid wing.......
Alan Lewis's close detail of the Blakeney Point empidonax wing formulae, carefully annotated by Brian Small