Mae’r Athro Stephen Harris wedi dal Cadeiryddiaeth y Gwyddorau Amgylcheddol ym Mhrifysgol Bryste ers 1992. Mae’n arbenigwr ar ymddygiad a lles mamaliaid gwyllt ac yn arbenigwr a gydnabyddir yn rhyngwladol. Disgwylir y bydd yn casglu tystiolaeth o ffynonellau amrywiol o bedwar ban byd.
Professor Stephen Harris has held the Chair of Environmental Sciences at the University of Bristol since 1992.  He is an expert on the behaviour and welfare of wild mammals, and is an internationally recognised expert.  It is expected that he will gather evidence from across the world from a variety of sources.