Here’s a demonstration of how I keep shrews and mice out of my hives over the winter. Check out my shrews category for more info on shrews.
Something weird happened. I got several emails from people asking me what I do to prepare my hives for winter.
I’m no expert, but here’s what I do, and what I do could change entirely by this time next week.
So the big question is: “How do you prepare your hives for winter?”
I removed the shrew-proofing mesh from my hives yesterday so I could clear out the dead bees that have accumulated so far this winter. I reattached the mesh afterwards with the use of a staple gun that produces a loud bang that vibrates through the hive and riles up the bees. But a suggestion from one of my readers changed everything:
“Would it be possible to secure it [the mesh] with drawing pins rather than staples?”
It’s absolutely possible. I did it today, just five minutes ago.
The drawing pins / pushpins work just as well as staples as far as I can tell. That mesh isn’t going anywhere.
Now I can easily remove the mesh, clean out the dead bees and reattach the mesh without bothering the bees. I thought I might need to find a different method for keeping the shrews out of my hive for next year. Not anymore. The mesh attached with pushpins instead of staples works perfectly. At least that’s my story for now.
Thanks for the tip, Emily.
December 18th, 2019: I’ve gotten into using regular thumbtacks instead of pushpins because the pushpins can be rather difficult to drive into the wood. A thumb tack is much easier to attach. To remove one, though, requires pulling the mesh off carefully and taking the tack with it, which can then easily go flying into the grass or get bent to the point of not being reusable. Still, they’re so much easier to use than pushpins, I might stick with them. I suppose I could use one of those staple remover things that look like a tiny fanged mouth, but that’s another gadget I’ll need to keep around and I’m more interested in reducing what I need to keep bees instead of adding more to the list.
I’m a true believer in moisture quilts as the best overall ventilation and moisture reduction aid for Langstroth hives in the winter. I’m a true believer because I’ve seen soaking wet hives become dry as a bone within a week of having moisture quilts installed.
Empty moisture quilts are excellent ventilation aids in the high heat of summer too, allowing the bees to regulate the temperature of the brood nest with less fanning and to cure honey sooner. Moisture quilts are also really cheap and easy to make. Everybody wins.
July 2019 Introduction: This post gets a little long, but I haven’t edited it down to be more concise because it demonstrates how my beekeeping practices evolve. At first, I just stapled quarter-inch mesh onto the bottom and top entrances to keep shrews out starting in October. Then I put it on just the bottom entrances so the bees could still get through the top entrances with no problems, at least until they began to cluster down for the winter. Then I switched to using push pins to attach the mesh because it’s less disruptive for the bees than the banging of a staple gun and it allows me to easily remove and reattach the mesh when I need to clear dead bees off the bottom board. And some people in Newfoundland only use half-inch mesh to keep mice out because they’ve never had problems with shrews. They’re lucky.
I was surprised to see some of my bees bringing in pollen today.
Judging from the colour of the pollen, my guess is that it came from Japanese Knotweed. It could be Honey Clover too. I still see some of that around (what a fantastic plant that is). I saw bees from another hive bringing in yellow pollen, probably from Goldenrod, though it seems late for Goldenrod.
This is the first year I’ve used quarter-inch / 6mm mesh to keep shrews out of my hives. I was told to put the mesh on after the bees have stopped bringing in pollen because supposedly the mesh opening is so small that it knocks the pollen off the bees’ legs as they go through it. But that’s not exactly true. Every bee that came in with pollen today at least had no problem getting through with the pollen still intact. So…
I had some frames of honey stored in a swarm trap in my shed and a mouse found a way in and probably came back night after night and had a feast. Here’s a photo of a frame of honey that’s been partially eaten by the mouse:
Here’s the view from the other side of the frame. You can see how the mouse chewed through the plastic foundation and the wood of the frame.
A mouse got inside my city hive because I waited too long to put on mouse-proofing mesh.
From what I can tell, the mouse (or mice) was in the hive for a long time and scared the bees, queen and all, into a honey super that I had placed above the inner cover during a late fall feeding.
It’s March 2019 and I’ve deleted and retitled the 2011 post that used to be here (though the comments are still intact). But here’s the gist of it:
No matter how it’s installed, half-inch (~12mm) mesh will not prevent shrews from getting into a hive. Shrews, or more accurately, the pygmy shrew, can even slip through standard 3/8-inch metal mouse guards. That’s why I use quarter-inch (6mm) mesh to keep both shrews and mice out of hives.
I know beekeepers in Newfoundland who only use half-inch mesh to keep mice out of their hives and have done so for years. I took most of my cues from them when I first started beekeeping. None of them ever told me about shrews, possibly because shrews weren’t a problem in their area.