Molecular evidence of a reed warbler x great reed warbler hybrid (Acrocephalus scirpaceus x A-arundinaceus) in Belgium

In English We report on the second case of a reed warbler x great reed warbler hybrid (Acrocephalus scirpaceus and A. arundinaceus). The bird was captured during a standardised ringing session in Belgium in autumn 1999, and fell between the parental species in all measurements. Molecular analyses of two microsatellite loci verified that the bird was a female that had a reed warbler father and a great reed warbler mother.