Last year, right at the end of July, a swarm of bees occupied the top left box in my 9-box cabinet. The box was one of 5 occupied that year. This pair had failed, but they were still roosting every night, until the day the bees arrived.
|The nestbox entrance is at the left end and the Swift nest platform is at the right hand end.|
This is the second time we have had bees occupying a Swift box, the last time was in a church where the bees survived the winter, so were removed to a hive, as the bell-ringers were getting stung!