Prolonged-mating
Guides
Omus dejeanii
Greater Night-stalking Tiger Beetle
Omus dejeanii is a flightless tiger beetle and the largest species in its genus, measuring 15–20 mm. It inhabits dense coastal forests from British Columbia to northern California. The species is nocturnal and exhibits exceptionally long mating durations averaging 29.4 hours, far exceeding most other tiger beetles. Males possess enlarged mandibles used both for prey capture and for grasping females during prolonged amplexus.