Rhagonycha fulva

The black apical patch on the elytra distinguishes Rhagonycha fulva from similar soldier beetles. The simple (non-bilobed) third tarsal segment and black tarsi separate it from related species. The combination of orange pronotum, red elytra with black tip, and soft body form is distinctive. Antennae are entirely black or with only the first segment orange.

Adults measure 8–10 mm in length with a soft, flexible body. The head and pronotum are orange and shiny with fine pubescence on the head. The pronotum narrows toward the head, though its shape is variable. The elytra are dark shiny red and cover the wings and most of the abdomen, terminating in a distinct black patch at the apical end—a key identifying feature. Antennae are black, though the first segment is occasionally orange. Legs have orange femora and tibiae with black tarsi; the third tarsal segment is simple (not bilobed).

Found in grassland, woodland, hedgerows, parks, and gardens. Adults frequent open-structured flowers, particularly umbellifers such as cow parsley (Anthriscus sylvestris) and hogweeds (Heracleum spp.), as well as Asteraceae. Larvae inhabit the base of long grasses.

Native to Europe and Anatolia. Introduced to North America with established populations in British Columbia, Quebec, and Ontario.

Adults active June through August. Peak activity coincides with flowering of umbelliferous plants.

Adults feed on aphids, pollen, and nectar. Larvae are predatory on ground-dwelling invertebrates including slugs and snails.

• Heracleum sphondylium - pollinatorSignificant pollinator
• Heracleum mantegazzianum - pollinatorSignificant pollinator
• Anthriscus sylvestris - foraging siteAdults frequently found on flowers

Larvae develop at the base of long grasses, preying on ground-dwelling invertebrates. Adults emerge in summer, living short lives focused heavily on mating. Specific details of pupation and overwintering stage are not documented in available sources.

Adults spend much of their short adult lives mating and are frequently observed in pairs on flowers, giving rise to the colloquial name 'hogweed bonking beetle.' They are significant pollinators of hogweed species. The soft body allows flexibility but provides limited protection.

Predator of aphids and other small invertebrates in both adult and larval stages. Significant pollinator of Heracleum sphondylium and H. mantegazzianum. Contributes to pollination services in grassland and woodland edge habitats.

Beneficial insect in gardens and agricultural settings due to aphid predation. The misleading common name 'bloodsucker beetle' has no basis in fact—the species does not bite humans. Popular cultural recognition in England under the humorous name 'hogweed bonking beetle.'

• Other Cantharidae speciesRhagonycha fulva distinguished by black apical elytral patch, simple third tarsal segment, and specific color pattern of orange pronotum with red elytra
• Cantharis speciesFormerly classified in Cantharis; R. fulva moved to Rhagonycha based on morphological differences including tarsal structure

The common name 'bloodsucker beetle' is entirely misleading—this species does not feed on blood or bite humans. The name likely arose from superficial resemblance to other insects or the red coloration.

• Coleoptera
• Cantharidae
• soldier beetle
• pollinator
• aphid predator
• Europe
• introduced species
• umbellifer associate

• BugGuide
• Wikipedia
• GBIF taxonomy match
• iNaturalist taxon
• NCBI Taxonomy
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