Dear MARMAM community, We are pleased to share with you our recent paper in the Journal of Experimental Biology, using movement data from Dtags to detect underwater prey capture and investigate foraging behavior in resident-type killer whales. Tennessen, J.B., Holt, M.M., Hanson, M.B., Emmons, C.K., Giles, D.A., Hogan, J.T. 2019. Kinematic signatures of prey capture from archival tags reveal sex differences in killer whale foraging activity. *Journal of Experimental Biology *222, jeb191874. doi:10.1242/jeb.191874 Studies of odontocete foraging ecology have been limited by the challenges of observing prey capture events and outcomes underwater. We sought to determine whether subsurface movement behavior recorded from archival tags could accurately identify foraging events by fish-eating killer whales. We used multisensor bio-logging tags attached by suction cups to Southern Resident killer whales (Orcinus orca) to: (1) identify a stereotyped movement signature that co-occurred with visually confirmed prey capture dives; (2) construct a prey capture dive detector and validate it against acoustically confirmed prey capture dives; and (3) demonstrate the utility of the detector by testing hypotheses about foraging ecology. Predation events were significantly predicted by peaks in the rate of change of acceleration (‘jerk peak’), roll angle and heading variance. Detection of prey capture dives by movement signatures enabled substantially more dives to be included in subsequent analyses compared with previous surface or acoustic detection methods. Males made significantly more prey capture dives than females and more dives to the depth of their preferred prey, Chinook salmon. Additionally, only half of the tag deployments on females (5 out of 10) included a prey capture dive, whereas all tag deployments on males exhibited at least one prey capture dive (12 out of 12). This dual approach of kinematic detection of prey capture coupled with hypothesis testing can be applied across odontocetes and other marine predators to investigate the impacts of social, environmental and anthropogenic factors on foraging ecology. You can obtain a copy of the article online: http://jeb.biologists.org/content/222/3/jeb191874 or from me (jennifer.tennessen@noaa.gov). Kind regards, Jennifer, Marla, Brad, Candice, Giles and Jeff -- Jennifer B. Tennessen, Ph.D. Postdoctoral Scientist Marine Mammal & Seabird Ecology Team, Conservation Biology Division NOAA/NMFS Northwest Fisheries Science Center 2725 Montlake Blvd East Seattle, WA 98112 Phone: (206) 860-3473