Late late swarms

 This year is the biggest years for swarms I've seen. 

 We just had what looked like a prime swarm land on our property in the second week of August. 

Then the next day another was spotted flying past, but they obviously had somewhere else in mind

 Once I had boxed the swarm I knew the queen was in as the workers started fanning to attract stragglers,

 You can see the Nasonov gland exposed as the bees stick their abdomens in the air and propel the  pheromone by fanning their wings. Within the hour all the bees were safely sitting in the box.