Posted: 28/11/2012 at 19:08
I sympathise thetuna. Nesting boxes for birds have different size apertures for each species so check what RSPB site recommends for nest box holes and that should help with mesh size choice.
I had to move seeds and fat balls from the feeder post to the dense, tangled branches of my Salix Caprea x Kilmarnock. The wood pigeons, it seems, cannot weave through the tangle but robins, nuthatches and all the different tit families love the cover. Even blackbirds shimmy through.
Squirrels are still the greediest and most persistent visitor but my dog really loves chasing them off - keeps him amused all afternoon.