Peregrine falcons have been seen flying around the East Mill and Belper causing speculation that they may nest at the site this year.
The Derbyshire Wildlife Trust, which has its headquarters in the Mill, excitedly reported the sightings this week.
The pair of falcons have been seen in the River Gardens area on a number of occasions and their preferred nesting sites are tall buildings such as churches or cathedrals so the mill would be the perfect spot.
The Trust watches over a pair nesting in Derby Cathedral each year and a website dedicated to the birds http://derbyperegrines.blogspot.co.uk/.
At the moment Derby’s famous pair have not laid any eggs despite the fact that others in Nottingham and Norfolk have.
A spokesman for the Derbyshire Wildlife Trust said: “It is a delight to see such magnificent birds here in Belper. It is great news for the town and the Derwent Valley. Visitors to the River Gardens may well be able to spot them this summer.”