It’s heron time

After a heron came and hunted down all the frogs and frogspawn in our garden pond last year, Mark bought a decoy heron which we have been moving to a new position each day.  Has this stopped the heron from coming to feast on our frogs?  Not a bit of it.   At least last year the heron would come in the early morning when no one was around, but today it has been brazenly strutting its stuff around the pond snaffling all the frogs it can get its beak into.  The useless decoy is in extras