I have a 1 yr old 8 frame 'garden hive' started from package bees and it now has 5 hive bodies on it. Is in a residential area. The last two hive bodies were added about 6 wk ago with the top queen excluded for honey. I check them everyday. They are a really active hive with a buckfast queen. Today at sunset I notice about big ball o' bees about soccer ball net size on the bottom of the hive beneath the screen bottom board. The hive is suspended between cinder blocks. I have a bait hive not too far away but don't want to lose them if this is a swarm and doesn't take to the bait hive. (No reason to assume they will, I guess). I have a cardboard nuc box for just such an occasion if this swarm is big enough to take and has a queen inside. So . . . I may need an answer tonight if they are going to depart tomorrow. Should I scoop them tonight?? Thanks for reading.