It's feared England's last Golden Eagle has died.
It had been resident at Riggindale at Haweswater in Cumbria but conservation staff haven't seen the bird of prey since November now.
The RSPB say they're restoring habitats in the Lake District in the hope of encouraging eagles to nest here in future.
Lee Schofield, Site Manager at RSPB Haweswater, said: “When the eagle didn’t appear last month we thought there was a chance he might be hunting in a nearby valley but over the past few weeks we’ve been gradually losing hope.
“We will probably never find out what happened to him but as he was around 19-20 years old, an advanced age for an eagle, it’s quite possible that he died of natural causes.
“His disappearance marks the end of an era as he has been an iconic part of the Haweswater landscape for the past 15 years. During this time, thousands of visitors have travelled from across the country hoping to catch a glimpse of him at the Riggindale Eagle Viewpoint. With him gone, the Lake District has become a bit less wild.”
Golden eagles arrived in the Lake District from Scotland in the late 1950s and a pair first bred at Hawewater in 1969. The original male died in 1976 and was replaced by Britain’s oldest known eagle who lived until he was at least 32 years-old. In turn, he was replaced in 2001/02 by the most recent male. The original female was replaced in 1981 by the last female who died in 2004.
Between 1970 and 1996, 16 young were produced at Haweswater, while a second pair of eagles bred in the Lake District from 1975 to 1983, fledging four chicks.
Lee Schofield continued: “At the moment the Lake District isn’t particularly attractive to golden eagles as there is a shortage of suitable habitat and food. By restoring a range of natural habitats at Haweswater, we hope this will lead to an increase in wildlife including birds and small mammals, which would provide a sustainable food source for golden eagles.”