Aw Jos how lovely, all those babies! Our starlings keep digging their beaks into the lawn to get at the leatherjackets (larvae of craneflies) which is excellent, as the larvae eat the roots of the grass and wreck the lawn.
Good for you olddude! I hate it too when stupid fishermen leave their detritus behind. So ignorant and thoughtless. Well done for holding the geese down and getting the fishing line off!