Shibboleth – excellent suggestion. I did this last year and there are loads of wee bugs loving it in there. I also stack up stones too. It’s also good for the foraging of hedgehogs etc..
Have a lot of fun with my nephews building these – we make little chambers by using short logs at either side then cover it over leaving a void. They sprinkle a bit of leaf litter inside for bedding – it really fires their imaginations.
I also have a GoPro which I leave next to openings where I’ve seen woodmice, toads etc. They love watching the footage on their iPad!
The next generation of conservationists!
Seriously though, I’d suggest that the OP does this anyway. If you get down on your hands and knees and have a look, there tends to be a void underneath hedges and large shrubs. Stack up a few bundles of sticks of all thicknesses and let nature move in and do the rest.