This ground protector guardian has wide mesh openings (6 x 6.5 cm gaps) which will restrict large birds such as pigeons and doves, while still allowing blackbirds, thrushes and starlings inside. This mesh size will not stop squirrels.
If you wish to prevent all but small garden birds from accessing your bird food, our adjustable ground sanctuary is a great choice, as you can set the mesh size to suit.
If you have hedgehogs in your garden please consider removing the ground protector at night, or lifting it off the ground at one edge. It's very unlikely, but possible that they may try to get inside and get stuck.