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Cycnia tenera
''Cycnia tenera'', the dogbane tiger moth or delicate cycnia, is a moth in the family Arctiidae. It occurs throughout North America, from southern British Columbia to Nova Scotia southwards to Arizona and Florida. The species is distasteful and there is evidence that it emits aposematic ultrasound signals; these may also jam bat echolocation, as the functions are not mutually exclusive.
==Ecology==
It is a common feeder on ''Apocynum cannabinum'' (dogbane, Indian hemp) which produces a milky latex containing cardenolides, toxic cardiac glycoside that defend against herbivores. It also feeds on milkweed species, ''Asclepias'', at least in parts of its range, but is most commonly reported from dogbane. Its interactions with bats have been much studied, but are an area of dispute regarding whether the clicks emitted by adult moths are disruptive of bat echolocation, or merely aposematic warning signals. The two functions are not mutually exclusive, however, so it may not be possible to resolve the issue. The moth's coloration appears to be aposematic for insectivorous birds.〔 Chemical signals do not prevent bats from attacking, but do cause bats to release ''C. tenera'' they have caught.〔
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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