Garden Bird: Products to Attract Wild Birds to Your Garden.
Bird Guardian
This tried and tested device protects eggs and baby birds in the nest box from squirrels, cats, magpies and other predators. Just 2inch long and made from strong plastic, the Bird Guardian is simple to fix to any wooden box with a hole up to 1inch (38mm) in diameter, using the 3 screws supplied.
Price GBP4.95
Always check at the store... Occasionally prices change slightly. You will also see the P&P charges if any for your purchase.
Delivery by 1st class post