BOS JLM & RIJNJA F (1970) Short announcements: Counts of birds of prey in the Flevoland. LIMOSA 43 (3): 160-160.
Counts of birds of prey in the Flevoland Common Buzzard Buteo buteo Rough-legged Buzzard Buteo lagopus Hen Harrier Circus cyaneus Merlin Falco columbarius Short-eared Owl Asio flammeus
