案例简介：@ joelsartore的视频 | 不，您没有看到double。实际上，这条平原吊袜带蛇确实有两个头。两头蛇是自然界中罕见的景象，是繁殖过程中发生突变的产物。这种情况被称为双头畸形，发生在胚胎不完全分裂时。内布拉斯加大学林肯分校爬行动物学实验室拍摄的视频。要查看照片方舟中的更多物种，请关注我 @ joelsartore。# 照片方舟

案例简介：Video by @joelsartore | No, you’re not seeing double. This plains garter snake does, in fact, have two heads. A rare sight in nature, two-headed snakes are the product of a mutation that occurs during reproduction. The condition, known as bicephaly, happens when there is an incomplete splitting of an embryo. Video taken at the Herpetology Labs at the University of Nebraska-Lincoln. To see more species featured in the Photo Ark, follow me @joelsartore. #PhotoArk

国家地理 - Video by @joelsartore | No, you’re not seeing double. This plains garter snake does, in fact, have two heads. A rare sigh

案例简介：@ joelsartore的视频 | 不，您没有看到double。实际上，这条平原吊袜带蛇确实有两个头。两头蛇是自然界中罕见的景象，是繁殖过程中发生突变的产物。这种情况被称为双头畸形，发生在胚胎不完全分裂时。内布拉斯加大学林肯分校爬行动物学实验室拍摄的视频。要查看照片方舟中的更多物种，请关注我 @ joelsartore。# 照片方舟

国家地理 - Video by @joelsartore | No, you’re not seeing double. This plains garter snake does, in fact, have two heads. A rare sigh

案例简介：Video by @joelsartore | No, you’re not seeing double. This plains garter snake does, in fact, have two heads. A rare sight in nature, two-headed snakes are the product of a mutation that occurs during reproduction. The condition, known as bicephaly, happens when there is an incomplete splitting of an embryo. Video taken at the Herpetology Labs at the University of Nebraska-Lincoln. To see more species featured in the Photo Ark, follow me @joelsartore. #PhotoArk

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国家地理 - Video by @joelsartore | No, you’re not seeing double. This plains garter snake does, in fact, have two heads. A rare sigh

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