Header: Switzerland_Ornithological.symposium.June21-22 Dear colleagues and bird enthusiasts, As part of the 100-year celebrations of the Swiss Ornithological Institute (Vogelwarte), it's our pleasure to announce a 2-day Scientific Symposium entitled "100 years of Vogelwarte: celebrating bird science", which will be held on June 21st and 22nd in Sempach, Switzerland. The aim of this symposium is to bring together researchers on ornithology to discuss current perspectives covering a wide range of topics, from bird monitoring and population modelling, to migration, evolutionary and ecological research and applied conservation. Each topic will be addressed by invited international experts, followed by presentations from researchers at the Swiss Ornithological Institute to celebrate the wide range of scientific research and achievements carried out at our Institute. We hope that this symposium will provide an opportunity to identify the important and urgent issues that the scientific community needs to address, and that it will kick-start new collaborations. Our list of invited speakers and the scientific program can be found on our website: https://www.vogelwarte.ch/en/100-years/centennial-symposium/ There is no registration fee, but we kindly ask you to register early using our website, since we are limited to 350 participants, and places are going quickly. The deadline for registration is April 30th. Sempach is located in central Switzerland, around 20 minutes from the beautiful city of Lucerne. Sempach is easily accessible by public transport from Zurich (1h30), Basel (1h50) or Geneva (3h30). Please, do not hesitate to spread the word to colleagues or students. On behalf of the organizing committee, we look forward to welcoming you in Sempach, Barbara Helm, Pierre Bize and Reto Burri Pierre Bize (to subscribe/unsubscribe the EvolDir send mail to golding@mcmaster.ca)