Seasonal morphological variations in bird schistosomes
The present work is a contribution to the systematics of Bilharziella and Dendritobilharzia.Wildfowl was killed in Mask hunting seasons or found dead in Champagne-Ardenne region, France, and autopsied with focus on schistosomes.Seven Anas platyrhynchos (mallards), one Ardea cinerea (grey heron) and two Cygnus olor (mute swans) were parasitized by B