Sunday morning angle grinding musings

If plastic herons, owls and other decoys keep predators away in the garden then would fake plastic slugs (a bit larger in size than normal ones) deter other slugs do you think? Also there are fake crocodile heads on the market to put in your pond “to keep big birds away” but how would a heron from Lewisham even know what a crocodile was? Above: some of the quality decoys on sale at the moment. We here at weeds currently have a 99p ebay bid on the life-like heron on the large wooden stick (which looks like what would be on the end of a large “rocket” firework). Keep your fingers crossed we get it!