Duffey S S
Science. 1970 Jul 3;169(3940):78-9. doi: 10.1126/science.169.3940.78.
The monarch butterfly Danaus plexippus sequesters cardiac gylcosides from northern species of Asclepias formerly reported to lack these noxious compounds. Thus, a new explanation must be sought as to why the monarchs reared on these northern asclepiads are palatable to avian predators.
黑脉金斑蝶（Danaus plexippus）会从以前被报道缺乏这些有毒化合物的北方马利筋属植物中摄取强心苷。因此，必须寻找一个新的解释，来说明为什么以这些北方马利筋属植物为食的黑脉金斑蝶会被鸟类捕食者接受。
