Observation: Photinus marginellus
Primary Observer:
Peggy Butler
Event Date:
2026-06-19
Status:
Unreviewed
Survey
Site Name:
Undisclosed
Province/State:
Pennsylvania
Event Date:
2026-06-19
Time of Day:
Night-Time
Start Time:
09:10
End Time:
10:30
Number of Observers:
3
Primary Observer:
Peggy Butler
Additional Observers:
Mary Patterson, Ross Patterson
target_species_genus:
photinus
target_species_species:
carolinus
Location and Habitat
Location Accuracy (meters):
0-25
Habitat Type:
Woodland/Forest - Trees dominant, and in the over-story
Habitat Type Notes:
predominantly old growth hardwoods and pines, open meadows and lawns
Elevation (meters):
356
Area Searched (hectares):
2
Artificial Light Sources
Vehicles: No
Street Lights: No
Buildings: No
kids with flashlights
Street Lights: No
Buildings: No
kids with flashlights
Artificial Light Types
Sky Glow (diffuse illumination in the sky): No
Light Trespass (light cast on surfaces beyond its intended target): Yes
Glare (bright light causing visual discomfort): Yes
Light Trespass (light cast on surfaces beyond its intended target): Yes
Glare (bright light causing visual discomfort): Yes
Artificial Light Notes:
Observation
Observation Type:
With Flash Data
Number Observed:
1
genus:
photinus
Species:
marginellus
Observation Notes:
1 quick flash at the edge of the forest.
Specimen Voucher Number:
Flash Behavior
First Flash Time:
09:45
Last Flash Time:
10:30
First Flash Temp (F):
68
Last Flash Temp (F):
66
Flashes in Pattern:
1
Flash Color:
Yellow
Flash Pattern Period:
5
Flash Duration:
<.1
Flash Interval:
4
Male Height Zone:
Low (0-3 ft)
Flash Location:
hovering above the grass and below the trees
