The white-tailed eagle was fairly common throughout much of Europe until the early nineteenth century.
A history of decline
Numbers started to decrease dramatically in the early nineteenth century because of persecution that resulted in the loss of many of the western European populations.
While conservation measures allowed the species to recover in the 1970s, the impact of mercury and of organochlorine and other pesticides continued to reduce the breeding success into the 1980s.
The white-tailed eagle was widespread in Scotland and Ireland in the 18th century, and also bred in England and the Isle of Man. More than 100 eyries were known in Britain and at least 50 in Ireland in the early 19th century.
The species became extinct in the UK as a result of direct and sustained persecution by shepherds, gamekeepers, fishery owners, skin collectors and egg collectors. Habitat loss was not a factor.
By 1800 the species had disappeared from England. It survived in Ireland a little longer, but by 1900 only a handful of pairs remained on the British Isles, all in Scotland. The last breeding record in Scotland was on the Isle of Skye in 1916, and the last British white-tailed eagle was shot in Shetland two years later.
A re-introduction programme by the Nature Conservancy Council (now Scottish Natural Heritage) and the RSPB started in 1975.
In the following ten years 82 young eagles from Norway were released on the Isle of Rum in the Inner Hebrides. The first successful breeding took place in 1985, and since then several pairs have nested successfully every year. Further releases in 1990s in Wester Ross ensured that the population became self-sustaining.
From around 1990 to 2012 numbers have risen 917 per cent based on annual surveys. Even so the white-tailed eagle is included on the Red list of UK birds of conservation concern because of the long-term population decline and since it is a rare breeder in the UK and across its European range.