Dark-firefly
Guides
Ellychnia
dark firefly, diurnal firefly
Ellychnia is a genus of fireflies (family Lampyridae) containing approximately 24 species found across the United States. Unlike most fireflies, adults are diurnally active and lack bioluminescent organs, instead using chemical signals for mate recognition. Adults are characterized by black bodies with distinctive rose-colored markings on the pronotum. Larvae inhabit rotting logs in moist terrestrial environments.
Ellychnia captiosa
dark firefly
Ellychnia captiosa is a species of dark firefly in the family Lampyridae. Unlike bioluminescent fireflies, members of the genus Ellychnia lack light-producing organs and are active during daylight hours. The species was described by Kenneth Fender in 1970. Dark fireflies represent a distinct ecological guild within the Lampyridae, having secondarily lost the nocturnal signaling behavior characteristic of most fireflies.
Ellychnia facula
Ellychnia facula is a species of firefly in the family Lampyridae. It is currently treated as a synonym of Photinus faculus in some taxonomic databases, though the original combination under Ellychnia persists in literature. The species was described by John Lawrence LeConte in 1854 and is recorded as widespread across North America. Like other members of the genus Ellychnia, this species belongs to the 'dark firefly' group—adults that lack the light-producing organs typical of most fireflies.
Ellychnia flavicollis
Ellychnia flavicollis is a species of firefly in the beetle family Lampyridae. It belongs to the genus Ellychnia, a group commonly known as "dark fireflies" that lack the light-producing organs typical of most fireflies. The species was originally described by John Lawrence LeConte in 1868. Based on available records, it occurs in North America. As with many Ellychnia species, detailed biological information remains limited.
Ellychnia hatchi
dark firefly
Ellychnia hatchi is a species of dark firefly in the family Lampyridae, first described by Fender in 1962. The species is currently recognized as a synonym of Photinus hatchi in some taxonomic databases, though it remains listed under Ellychnia in others. Dark fireflies of the genus Ellychnia are non-luminescent as adults, lacking the light-producing organs characteristic of most fireflies. The species is known from North America.
Ellychnia irrorata
Ellychnia irrorata is a species of firefly in the family Lampyridae, originally described by Fender in 1970. The species was formerly placed in the genus Photinus as Photinus irroratus but has since been transferred to Ellychnia. Like other members of the genus Ellychnia, this species belongs to the 'dark fireflies'—a group that lacks the light-producing organs characteristic of most fireflies. The species is part of a taxonomically complex group where species boundaries and generic placements have undergone revision.
Ellychnia lacustris
Ellychnia lacustris is a species of firefly in the family Lampyridae, originally described by LeConte in 1852. The species is currently treated as a synonym of Photinus lacustris in modern taxonomic databases. Like other members of the genus Ellychnia, this species belongs to the group commonly known as "dark fireflies"—species that lack the bioluminescent organs characteristic of many lampyrids. The species has been recorded from North America.
Ellychnia megista
Ellychnia megista is a species of dark firefly in the family Lampyridae, described by Fender in 1970. Like other members of the genus Ellychnia, this species lacks the light-producing organs characteristic of most fireflies and is active during daylight hours rather than at night. The species is currently accepted in the genus Ellychnia, though it was originally described under Photinus. Dark fireflies in this genus are among the most commonly encountered fireflies in western North America, particularly in the southwestern United States and Rocky Mountain regions.
Pyropyga decipiens
Sneaky Elf
Pyropyga decipiens is a firefly species in the beetle family Lampyridae, commonly known as the 'Sneaky Elf.' It belongs to the 'dark firefly' group—species that lack the conspicuous bioluminescent flashes typical of better-known fireflies. The species is widely distributed across North America, with records from New Brunswick, Canada, throughout the United States, and into the southwestern regions. Despite being one of the most common fireflies in parts of the western United States, particularly the Front Range of Colorado and the Southwest, it was notably omitted from major firefly field guides. Adults are diurnal or crepuscular and do not produce the dramatic light displays associated with other firefly genera.
Pyropyga nigricans
Dark Firefly
Pyropyga nigricans is a species of dark firefly in the beetle family Lampyridae. Unlike many fireflies, it does not produce bright bioluminescent flashes. The species is widespread across North America, Central America, and central Europe, and is often the most common firefly in arid regions of the southwestern United States and Colorado Front Range. Adults are active during summer months and are frequently encountered in grassy areas near water sources.