Every 2 years, the American Ornithological Society bestows the Brina C. Kessel Award for a paper published during the preceding 2 yr in The Auk: Ornithological Advances that has made an exceptional contribution to ornithology. The Kessel Award for 2020 is presented to Corey Tarwater, Ryan Germain, and Peter Arcese for their paper, “Examination of context-dependent effects of natal traits on lifetime reproductive success using a long-term study of a temperate songbird,” published in 2018.