Swarm moved into my owl nest box — how do I get them out without destroying the box?
Devon, 4th year. We've got a tawny owl box about 3 m up an ash at the bottom of the garden, empty since the winter, and a swarm has moved in — I watched the tail end of them going in yesterday afternoon. So probably in residence about 24 hours now.
The box was expensive and my husband built the mounting bracket, so 'cut it open' is very much a last resort. It has a hinged inspection lid on top, opening is a 15 cm round hole. If they've only been in a day, is there a window where I can just shake/pour them into a nuc before they've built much? Or am I already into rubber-banding comb into frames territory? And how do I stop them just flying straight back to the box afterwards?
#swarm-removal#cutout#nest-box
▲ 16 votes💬 4 replies✅ Solved
4 replies
GeorgiaWes · Jun 23, 2026 · ✅ Accepted answer
24-48 hours in, you're in luck — festooning bees and maybe palm-size bits of fresh white comb, no brood yet. Open the lid, gently break any comb free (it'll be soft), and shake/scoop the cluster into your nuc. Get the queen and the rest follow. Then here's the key part: close the owl box hole with mesh or a rag for a week so returning scouts can't rehome, and put the nuc right at the base of the tree overnight before moving it. If you see eggs in that comb, band it into a frame and give it to them — they'll anchor to their own brood.
PerthshireBees · Jun 23, 2026
Do it in the evening when everyone's home, and wear the full suit — swarms are gentle but a swarm you're pouring out of a dark box is a different mood. A frame of open brood from another colony in the nuc is the best anchor there is, better than lemongrass or anything else.
CorkBeeRon · Jun 24, 2026
Also give the owl box a scrub with washing soda once they're out and keep it blocked a good while. A cavity that smelled right to one swarm smells right to the next, and you don't want an annual event. Ask me how I know — same compost bin, three years running.
DevonBees_Em · Jun 24, 2026
Done last night, exactly as described — two bits of comb the size of my hand, no eggs yet. Poured them into the nuc with a frame of open brood borrowed from hive 2, mesh over the owl hole. This morning they're fanning at the nuc entrance like they own the place. Owl box intact, husband smug about the hinged lid.