AUTHOR=O’Connor Jingmai Kathleen , Field Daniel J. , Sullivan Corwin TITLE=Editorial: Early Avian Evolution JOURNAL=Frontiers in Earth Science VOLUME=9 YEAR=2021 URL=https://www.frontiersin.org/journals/earth-science/articles/10.3389/feart.2021.730214 DOI=10.3389/feart.2021.730214 ISSN=2296-6463