This morning a small flock of Lesser Redpolls was feeding on Willow Herb, along the Lower Path. They were all typically brownish birds except one which was predominantly grey. This bird was slightly larger than its companions and when it preened its rump it looked nearly all white and its breast was very pale with a slight pink suffusion. Views were not good enough to eliminate an Arctic Redpoll and the beak size and shape were not seen but the bird is tentatively identified as a Mealy Redpoll (Carduelis flammea). PS.