Observations of the Great Cormorant Phalacrocorax carbo Predating on Brown Rat

Abstract

We documented the predation of a Brown Rat Rattus norvegicus by a Great Cormorant Phalacrocorax carbo, a large fish-eating bird, by direct observation. There have been few records of predation on mammals by cormorants. We assume this is the first direct observational record of predation on mammals by the Great Cormorant.