Dear Gary: After seeing and hearing barn owls in our backyard last summer and fall, we decided to put up a barn owl nest box. It is on a pine tree trunk, approximately 20 feet above the ground.

Moving into your own home is usually a good excuse for a party. But once this creature had squirrelled away his nuts and seeds, there was only one guest invited to the housewarming – his mum.

Not only has the cheeky squirrel taken over a bird nesting box, but it regularly scrambles around inside the visitors' centre A cheeky red squirrel has barricaded up a tawny owl breeding box in the ...