Protection of Arctic Terns, experimental device against gulls, Isle of May, Scotland

sterna paradisea sterna paradisaea sterna laridae charadriiformes aves vertebrata natural reserve population management adult group posing nest to competition rivalry inter specific nest breeding cage protection overview scotland protect north sea sterna arctic tern sterna paradisaea migratory species least concern iucn lc nobody environment protection environment management biodiversity management environment species management stage of development individual enumeration reproductive behaviour behavior relation between species species animal construction animal accessory animal use and care shot great britain united kingdom european union europe north atlantic ocean atlantic ocean world sea and ocean laridae charadriiformes aves vertebrata tern sterne sea bird bird wild animal species particularity low risk iucn lr iucn red list of threatened species nature reserves nature reserve populations managements adults groups posed pose settlings settling nesting nested competitor competitors compete competing competitions rivalry competitions rivalries inter specific nests breeding cages breeding ground breeding grounds nest box nest boxes birdhouse birdhouses bird house bird houses protections overviews global sight global sights full length defend protecting defending defended protect itself protecting itself arctic terns sterna paradisea least concern species with nobody sterna paradisea sterna paradisaea