This male Pterotus obscuripennis, a firefly (fireflies are actually beetles) found in California, does not emit light flashes like its eastern cousin – it is the female of this species who has light organs that can emit a luminescent glow. But she never goes through metamorphosis and retains a larval appearance all the way into adulthood. Californians always have to do things their own way…
Firefly – Pterotus obscuripennis ♂