▁Area . ▁ ▁Y n ys ▁Fe ur ig ▁is ▁also ▁a ▁Site ▁of ▁Special ▁Scient ific ▁Interest . ▁Bird s ▁inter change ▁regularly ▁between ▁all ▁three ▁sites , ▁and ▁form ▁part ▁of ▁a ▁larger ▁Irish ▁Sea ▁t ern ▁population ▁together ▁with ▁birds ▁at ▁sites ▁in ▁Ireland ▁such ▁as ▁Rock ab ill ▁Island . ▁The ▁major ▁threat ▁to ▁the ▁t ern s ▁here ▁is ▁pred ation ▁by ▁r ats ; ▁in ▁ 1 9 7 8 ▁r ats ▁killed ▁ 1 7 ▁adult ▁t ern s ▁including ▁ 1 4 ▁rose ate ▁t ern s , ▁as ▁well ▁as ▁taking ▁all ▁the ▁eggs ▁and ▁young ▁of ▁that ▁year . ▁The ▁R SP B ▁w arden ▁the ▁site ▁to ▁protect ▁the ▁t ern s ; ▁management ▁measures ▁they ▁have ▁undert aken ▁here ▁to ▁help ▁increase ▁the ▁rose ate ▁t ern ▁population ▁include ▁small - scale ▁control ▁of ▁veget ation ▁and ▁provision ▁of ▁nest box es , ▁although ▁it ▁is ▁thought ▁that ▁the ▁number ▁of ▁bre eding ▁pairs ▁at ▁this ▁site ▁is ▁primarily ▁dependent ▁on ▁the ▁overall ▁health ▁of ▁the ▁Irish ▁Sea ▁population . ▁ ▁The ▁site ▁first ▁came ▁to ▁national ▁attention ▁among ▁bird ers ▁in ▁July ▁ 2 0 0 5 ▁when ▁a ▁so oty ▁t ern ▁paid ▁a ▁very ▁brief ▁visit , ▁before ▁re loc ating ▁to ▁The ▁S ker ries ▁and ▁C em lyn . ▁ ▁References ▁ ▁External ▁links ▁ ▁Category : Is lands ▁of ▁Ang les ey ▁Category : S ites ▁of ▁Special ▁Scient ific ▁Interest ▁in ▁West ▁G w