Species Snapshot
TYPE:
Flashing firefly
GENUS:
Pyractomena
SIZE:
Small to Med (7 - 11 mm)
HABITAT:
Open areas, often near moving water
MONTHS:
May, June, July
TIME:
40 minutes after sunset
Flash Pattern
P. marginalis
How to Understand the Flash Pattern image
The background of the image represents a common habitat where the firefly might be seen. The colored dots or dashes represent the flashes over time and across space (height and distance flown between flashes). Note the number of flashes, the timing in between flashes, and the color, duration, and shape of the flashes.
Note that the flash pattern will often get faster as the temperature rises.
Physical Appearance
P. marginalis
Size:
Pronotum:
(Head Shield)
Small to Med (7 - 11 mm)
Yellow with large black elongated triangle in center, bordered with pink. Sides have thin dark marks. Noticeable central ridge.
Scutellum:
Dark
Elytra:
(Wing Covers)
Dark with well-defined yellow borders
Abdomen:
Thorax:
Eyes:
Dark
Dark
Large. Male's eyes are larger than the female's.
Male has 2 lanterns on abdominal segments 6 & 7. Female has 4 lanterns, 2 each on segments 6 & 7.
Lanterns:
Legs:
Short
Map of Arkansas Sightings
P. marginalis
More information on IUCN Red List of Threatened Species