The birds were shot at Norton Mills lake in North Stainley, which could have put people's lives at risk as well.
Police say the eight geese and swans were shot and left to die.
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The remaining two anti-fracking protestors who climbed a rig at a live well site in Kirby Misperton, North Yorkshire, have been removed.
The incident near Fenrother involved a Honda Civic travelling south from Scotland and a Seat Ibiza travelling north from Morpeth.