Sarah A. Sonsthagen Ann Elizabeth Riddle-Berntsen Evan Kuhel Robert N. Rosenfield 2021 <p><span>Cooper's Hawks (</span><i>Accipiter cooperii</i><span>) typically lay 3–5 eggs per clutch, rarely 6 eggs, and there are 2 accounts of 7-egg clutches and 1 record of a maximum 8-egg clutch for the species. Brood sizes of 3–5 young are common and the previous maximum brood count is 6 young. However, in 2019, we found an urban nest in Stevens Point, Wisconsin, with 7 eggs that resulted in a record high of 7 fledglings. We genetically confirmed that the attending male sired all the offspring and the attending female laid all 7 eggs. Larger body size of the tending adults may have been a factor in the exceptional reproduction reported here.</span></p> application/pdf 10.1676/1559-4491-132.2.460 en Allen Press Record fledging count from a seven-egg clutch in the Cooper’s Hawk (Accipiter cooperii) article