Rhagium

Rhagium

*Rhagium* Fabricius, 1775 encompasses some of the most recognizable bark-associated longhorn beetles of the Palearctic, with broad, flattened bodies and cryptic mottled patterning that renders them nearly invisible against tree bark. Larvae develop subcortically over two to three years beneath the bark of dead and dying conifers — principally *Picea*, *Pinus*, *Abies*, and *Larix* — though broadleaved hosts including *Betula*, *Fagus*, and *Quercus* are also recorded. Females oviposit into recently dead or freshly felled timber, and larvae favour thicker bark, sometimes ascending to 10–15 m on large *Abies* trunks. Adults are active from early spring through early summer, frequently found sh…

Seasonal activity

Flight season: Spring–Summer

Green = active months · Orange = peak

Host plants

Primary hosts: oak pine beech

External resources

GBIF · Wikidata · Käfer der Welt

Field tip: Pod kůrou mrtvých stromů celoročně. R. inquisitor pod jehličnatou kůrou, R. sycophanta pod dubovou. Raně jarní aktivita imag.