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Catocala junctura
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The Joined Underwing or Stretch's Underwing (''Catocala junctura'') is an Erebidae species. It is found throughout temperate North America. The species ranges from New York and Pennsylvania west to Montana, Colorado, Oklahoma, Arizona and into Texas, and north to southern Illinois, extreme southern Alberta and Saskatchewan; it has also been recorded west of the Rocky Mountains from California and south-eastern British Columbia. It is typically found near water, where the foodplants of its caterpillar larvae grow plentifully.
==Description and ecology==
The wingspan is 70–75 mm or more. The forewings are grayish to brownish with prominent black bands above, and whitish below. The upperside of the hindwings is orange-red, with two roughly concentric blackish bands on each wing and lacking hairs at the base. The outer band separates a margin that is lighter in color than the rest of the upper hindwing. The inner band does not reach the trailing edge; its hindward tip forms a hook which points back at the wing base or almost so. The underside of the hindwings is whitish along the leading edge; the trailing three-quarters of the wing are orange-red. The inner black band is present on the underwings also. As in many relatives, the foreleg tibia of this species possess no spines, while the tarsi carry three rows of spines.〔Nelson & Loy (1983)〕
Adults are on the wing from June to September depending on the location. There is probably one generation per year. The caterpillars feed on willow species (''Salix'') and – in the west of their range – Fremont Cottonwood (''Populus fremontii'').
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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