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Narrow Searcher Beetle
Calosoma externum
Calosoma externum, the narrow searcher beetle or churchyard caterpillar hunter, is a species of ground beetle in the subfamily of Carabinae. It was described by Say in 1823. This species is found in most of the United States, where it inhabits fallow fields and may also be found around margins of standing water. The species has also been recorded from the northern shores of Lake Erie in Canada.
Adults reach a length of 28-35 mm and have a black body with bluish reflections on the margins.
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geo-referenced records in GBIF, from museums, herbaria and field observers.
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Every page naming Calosoma externum in the Biodiversity Heritage Library →
This page is assembled live from iNaturalist, GBIF, Wikipedia, the Source Library and the Internet Archive. It is not yet part of the hand-edited codex. iNaturalist taxon 215911.