
At the turn of the century, the peregrine falcon was known to nest in all regions offering suitable rocky environments, with cliffs being its favourite nesting place. The département of the Jura alone was home to around 60 couples during the 1940s. But their population soon declined and dropped to only 3 couples in 1968. Thanks to efforts to protect the species (awareness, biotope protection order), their numbers have now improved and there are now around 50 couples within the High-Jura Park.