AUTHOR=Robinson W. Douglas TITLE=Grand challenges at the frontiers of bird science JOURNAL=Frontiers in Bird Science VOLUME=1 YEAR=2022 URL=https://www.frontiersin.org/journals/bird-science/articles/10.3389/fbirs.2022.994063 DOI=10.3389/fbirs.2022.994063 ISSN=2813-3870