- German Ornithologists´ Society (DO-G)
http://www.do-g.de/news/?L=1 - Special Interest Group Woodpeckers
http://www.do-g.de/special-interest-groups/sig-woodpeckers/?L=1 - Instituto de Biología Subtropical-CONICET
https://ibs.conicet.gov.ar/ - Swiss Ornithological Institute
https://www.vogelwarte.ch/en/ - Milan Vogelschutz Biel (local BirdLife Switzerland association)
https://www.milanvogelschutz.ch/
