Aegosoma

Aegosoma

*Aegosoma* Audinet-Serville, 1832 is a medium-to-large prionine longhorn beetle (25–60 mm) of striking robust build, clad in warm brown tones with fine, sparse pubescence. The single European species is a creature of old riparian and broadleaf forests, where adults emerge at dusk from late spring through summer, flying strongly to light sources. Larvae develop over three to four years deep within the heartwood of veteran deciduous trees — principally willows, poplars, and oaks — making the genus dependent on the persistence of large, old-growth timber. Across much of its range the genus is in decline, a direct consequence of the loss of ancient riparian trees.

Seasonal activity

Flight season: Summer–Autumn

Green = active months · Orange = peak

Host plants

Primary hosts: oak poplar

External resources

GBIF · Wikidata · Käfer der Welt

Field tip: Velký, noční, létá ke světlu. V starých lužních lesích (VI-IX). Tykadla s trny na článcích.