Absolute scenes round the house this evening as a Swift repeatedly banged one of the nestboxes. Quite hilarious to watch, as it skidded across the sloping roof, crash landed in the gutter and eventually hung on to the front. After three successful landings, it finally went all the way into the box, turned round and poked it's head out, looking rather pleased with itself! It sat there for half a minute then dropped out and away. Really fantastic! Later, five Swifts were tearing around the rooftops, but no more banging. Presumably the banger is a non-breeding bird - probably a one year old - checking out a potential breeding site for next year. Here's hoping!
....and it's in!