Dear colleagues, We are pleased to invite you to a TDWG 2020 Birds of a Feather (BoF) discussion on 22nd September, (UTC 14:30 – 16:30). The details of the session are: *TDWG 2020 Birds of Feather session, “BoF01: Converging Digital Specimens and Extended Specimens - Towards a global specification”* ( https://www.tdwg.org/conferences/2020/working-sessions/), co-convened by Alex Hardisty (Cardiff University, DiSSCo) and Andrew Bentley (KU Biodiversity Institute, BCoN). The purpose of the BoF is to explore the commonalities and differences of the Digital Specimen and Extended Specimen concepts with the aim of converging towards a global specification. As a participant of the DiSSCo Prepare project and/or member of the DiSSCo Technical Team, you may find this discussion interesting. Please add this to your diary. To join the BoF, it’s necessary for individuals to register for the TDWG 2020 working sessions week and then each person will receive a personal zoom address. The registration link can be found on this session schedule page: https://www.tdwg.org/conferences/2020/working-sessions-schedule/. Kind regards Alex Hardisty Andrew Bentley Cardiff University University of Kansas -