PeerJ Author 135 Points Contributions by role Author 135 Contributions by subject area Animal Behavior Zoology Sonja C Ludwig PeerJ Author Summary Animal Behavior Zoology PeerJ Contributions Articles 1 January 3, 2017 Social and environmental factors modulate leucocyte profiles in free-living Greylag geese (Anser anser) Didone Frigerio, Sonja C. Ludwig, Josef Hemetsberger, Kurt Kotrschal, Claudia A.F. Wascher https://doi.org/10.7717/peerj.2792 PubMed 28070455