AUTHOR=Scanes Colin G. TITLE=Grand and Less Grand Challenges in Avian Physiology JOURNAL=Frontiers in Physiology VOLUME=Volume 8 - 2017 YEAR=2017 URL=https://www.frontiersin.org/journals/physiology/articles/10.3389/fphys.2017.00222 DOI=10.3389/fphys.2017.00222 ISSN=1664-042X