Gray whales stranded in Mexico, the United States and Canada (17 December 2018 to 31 December 2021) by age class and geographic location from south to north.

MX = Mexico, CA = California, OR = Oregon, WA = Washington, BC = British Columbia, AK = Alaska. The number in the parentheses is the subset of whales included in this study.

MX即墨西哥（Mexico），CA即加利福尼亚州（California），OR即俄勒冈州（Oregon），WA即华盛顿州（Washington），BC即不列颠哥伦比亚省（British Columbia），AK即阿拉斯加州（Alaska）。括号内的数字为本研究纳入的鲸类亚群数量。