Southern Resident Killer Whales are endangered; only 85 remain. In today's modern ocean they face many threats simultaneously. A holistic approach to addressing the cumulative impacts of all threats is needed. However, data are sparse, making it difficult to identify which threat(s) is causing the most harm. We are developing a new, comprehensive way to assess threats by having experts fill data gaps. With your help, we can pinpoint which protective actions will help Southern Residents recover.