The absolute highlight of autumn migration this year was an influx of Yellow wagtails at Cosmeston (Yellow wags, 7 September). By sheer co-incidence, their passage coincided perfectly with the grass in one of the outer fields being cut for hay, which created the perfect habitat for these insect-eating wagtails. The presence of a few attracted more birds as they passed through so that there were more than 30 birds present at one stage, a record for the park according to long-time-birding locals. It was an absolute delight to watching them hopping through the clumps of cut grass, searching for the food that would help fuel their onward journey, and they only moved on when, after a week’s drying, the hay was baled.