Steve Watson and Richard Sale / June 2020 – vol. 113, issue 6, pp 354–362 Abstract The breeding population of Peregrine Falcons Falco peregrinus on the Atlantic coasts of north and west Cornwall appears to be declining dramatically. During 2015–19, both clutch size and the number of fledglings decreased significantly, yet neither can explain the decline in eyrie occupation. We suggest that the primary cause of the population decline is an increase ... This article is only available to registered users.To read more, please log in or purchase a subscription.