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''Phyciodes orseis'', the Orseis Crescentspot or California Crescent, is a butterfly of the Nymphalidae family. It is found in the western North America, particularly northern California and Oregon. Formerly, The range was thought to extend along the Coast Range as far south as San Francisco. However, they were either mislabeled or are currently extirpated from these regions. The habitat consists of mountain valleys, meadows and stream canyons. Along with roughly 120 other species, they are check-listed as Butterflies Occurring on or near the Fremont-Winema National Forests. This checklist has been established based on observations throughout Lake and Klamath Counties in Oregon. The list is maintained by the Forest Service in order to monitor health of native ecosystems. Monitoring population levels of butterflies such as ''P. orseis'' over time provides a metric for these efforts. These pollinators play an integral role in such systems, as they are beneficial both for the flora of the region and as food sources for regional avian species. The wingspan is 32-42 mm. The wings are dark brown with orange-brown markings in distinct bands.〔(Butterflies and Moths of North America )〕 Adult flights occur annually, typically from mid-May to the end of June.〔 Eggs are laid in large clusters on host plants, which are typically of the genus ''Cirsium'' (Family Asteraceae). After hatching, specimens will overwinter as a third instar larva. ==Subspecies== *''Phyciodes orseis orseis'' *''Phyciodes orseis herlani'' Bauer, 1975 (California, Nevada: Douglas Co.) 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Phyciodes orseis」の詳細全文を読む スポンサード リンク
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