Seabirds often engage in coordinated, cooperative foraging to improve detection and capture of prey. An extreme example of such coordinated behavior is synchronicity, whereby the movements of individuals are aligned temporally and spatially. Synchronous diving among penguins has been reported, but simultaneous observations of predation by synchronously diving individuals have not. We instrumented chinstrap penguins (Pygoscelis antarcticus) during their incubation period in December 2019 from Cape Shirreff, Livingston Island, Antarctica (60.79°W, 62.46°S) with video and depth recorders to monitor predator foraging behavior and prey consumption rates. Serendipitously, two instrumented individuals, accompanied by a third, banded individual, engaged in synchronous foraging activities on Antarctic krill (Euphausia superba) for 9.25 h. This group formed ashore, transited together to their foraging area, remained in close visual contact after dives, synchronously timed diving behavior, and foraged at similar depths. Prey capture rates were positively correlated across dives and total consumption estimates were equivalent for the two instrumented birds during the video observation period. Video loggers confirmed that synchronous diving and foraging behavior are among the behavioral repertoire of chinstrap penguins and demonstrated equivalent prey capture rates by synchronously foraging predators. The results further suggest that group formation while ashore and group cohesion during a foraging trip may facilitate shared foraging success among group members.

海鸟经常进行协调、合作的觅食，以提高对猎物的探测和捕获。这种协调行为的一个极端例子是同步性，即个人的运动在时间和空间上都是一致的。企鹅之间的同步潜水已有报道，但同步潜水的个体对捕食的同时观察还没有。我们在 2019 年 12 月来自南极利文斯顿岛 (60.79°W, 62.46°S) 的南极洲利文斯顿岛 (60.79°W, 62.46°S) 的潜伏期对下巴企鹅 ( Pygoscelis antarcticus ) 进行了检测，以监测捕食者觅食行为和猎物消耗率。偶然地，两个装备了仪器的个体在第三个带状个体的陪同下，在南极磷虾上进行了同步觅食活动（Euphausia superba ) 9.25 小时。这群人在岸上形成，一起过渡到他们的觅食区，潜水后保持密切的视觉接触，同步计时潜水行为，并在相似的深度觅食。不同潜水的猎物捕获率呈正相关，并且在视频观察期间，两种仪器鸟类的总消耗估计值相等。视频记录器证实，同步潜水和觅食行为属于下颚带企鹅的行为清单，并通过同步觅食捕食者证明了等效的猎物捕获率。结果进一步表明，上岸时的群体形成和觅食旅行期间的群体凝聚力可能有助于群体成员之间共享觅食成功。