2 more magnets

I have 2 more magnets with 2 more endangered species we have living in our riverbeds. The black billed gulls are unlike other gulls as they breed in the highcountry in riverbeds and dont go to sea until a juvenile. The back fronted terns are similar but are endangered because of predation by wild cats and hedgehogs. A hedgehog can completely wipe out a colony overnight!!!!