Does constant effort netting estimate juvenile abundance?

Abstract
Numbers of juvenile Blackbirds, Song Thrushes, Blue Tits and Great Tits caught during constant effort mist‐netting were compared with numbers of nestlings of these species ringed during the years 1979–1990 in Treswell Wood, Nottinghamshire. There was a significant relationship between the numbers of juveniles captured and the numbers of nestlings ringed for Blackbirds, Blue Tits and Great Tits. Implications for the BTO Constant Effort Sites Scheme are discussed.

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