Observations on the Mating System and Breeding Success of Marsh Harriers in Coastal South-eastern Australia

Marsh Harrers Circus aeruginosus bred at a density ol one pair per 67 ha and all pairs were monogynous. Clutch sizes averaged 3.6 eggs and 2.0 young were fledged per successful nest, or 1.3 young per nest site. The mean fledging date was 6 January

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