A new report by Scottish Natural Heritage (SNH) confirms results from previous years showing that Scotland's seabird numbers have continued to decline, although there are some species that have fared better than others. The report uses data collected by volunteers and professionals from a sample of breeding colonies around Scotland. It shows that, from 1986 to 2011, the numbers of seabirds breeding in Scotland has dropped by around 53%. Of the 11 species reviewed over the 25-year period, the numbers of nine decreased. The largest declines were for the Arctic skua (74%), Arctic tern (72%) and black-legged kittiwake (66%). Two…