Changes in Nightjar Caprimulgus europaeus populations in upland forests in Yorkshire

The Nightjar populations of Yorkshire's upland forests have grown significantly during recent years, probably as a result of a concurrent increase in the available area of suitable habitat due to forest management. In common with other populations it appears that the birds utilize younger, more open plantations. Comparison, based on discriminant analysis, of the habitat characteristics of forest plantations occupied and unoccupied by Nightjars suggests two things. First, that birds are more likely to occupy larger rather than smaller clearings and, second, that the study populations are close to their maxima. However, with continuing rotational felling, the area should continue to support a similar population.