I was going to say this is puzzling in view of my observations of the birds flying out of Canada in the evenings last week, but the birds now have breeding patches on, so perhaps they are spending days inland and heading to Durleigh reservoir or Steep Holm for nesting purposes?
Last year I was filming Carbo Sinensis, the European incomers, at Fairburn Ings, Yorkshire and the birds were nesting on the reserve, but flying out during the day to feed.
I'd love to know more about these fascinating birds.
