While conjoined twins have been documented in humans and other mammals and reptiles, finding conjoined birds is difficult, as they likely die before being discovered, Rowe said.

• 洛威指出，虽然人类连体婴早有记载，但发现其他哺乳类、爬虫类及鸟类连体婴是很困难的，因为牠们很可能在被发现之前就已死亡。