This is the nest built by a pair of non breeding Swifts in one of our nest boxes. One of the pair first entered the box on 21st June. After days trying to entice a mate in the second bird entered the box and joined it to roost on 28th June. They soon set about gathering nest material, all of which is collected in the air. Many feathers and pieces of grass were brought in right up until 13th August. Shortly before they migrated south they added masses of thistle down(a material easily gathered in flight) which covered the whole nest area.It really is a beautiful sight. I now have to hope that both birds have a safe journey to Africa and back. All being well they will return to raise their first brood next May.