About Carabus problematicus Herbst, 1786
Carabus problematicus Herbst, 1786 is a species of beetle that is endemic to Europe. Within Europe, it has been observed in Andorra, Austria, Belgium, Great Britain, the Czech Republic, mainland Denmark, the Faroe Islands, Finland, mainland France, Germany, Hungary, Iceland, Ireland, mainland Italy, Latvia (its presence there is considered doubtful), Liechtenstein, Luxembourg, mainland Norway, Poland, Romania, northern and northwestern Russia, Slovakia, Slovenia, mainland Spain, Sweden, Switzerland, and the Netherlands. One study examined how grazing management impacts arthropod distribution. The study found that large clusters of C. problematicus were more often associated with plots grazed only by sheep, compared to plots grazed by both sheep and cattle. This observation suggests that cattle have detrimental effects on this species, which may occur as a result of soil compaction caused by cattle.
