Merret (1666) claimed that the "lanar" lived in Sherwood Forest and the Forest of Dean in England; such populations would seem to derive from escaped hunting birds of the nobility.
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Reasons for its scarcity in East Africa possibly include competition for food and nest sites with the larger and more dominant Peregrine Falcon (Falco peregrinus) and predation of young by the Peregrine Falcon, Lanner Falcon (Falco biarmicus) and owls.