In the early twentieth century, very few ospreys were breeding in Scotland. They had been persecuted for decades and their eggs stolen by collectors. In 1954, a pair successfully raised two chicks near Loch Garten which gave conservationists hope that they could return to Scotland as nesting birds. Operation Osprey was launched to protect them from those intent on raiding their nests, with volunteers watching the nest at Abernethy twenty four hours a day. It proved a difficult journey but seventy years on, there are now numerous nesting ospreys in the UK. Jess Tomes from RSPB Scotland talks about the effort involved in the operation and wildlife ecologist Roy Dennis recalls the role he played in the 1960s.