Sexing Red-throated Divers in Shetland

Okill, J. D., French, D. D. and Wanless, S. 1989. Sexing Red-throated Divers in Shetland. Ring. & Migr. 10: 26–30. We describe a method for sexing breeding Red-throated Divers using body measurements taken from birds ringed on Shetland 1979–87.