Observation: Photinus pyralis
Primary Observer:
Lisa Zimmerman
Event Date:
2026-08-19
Status:
Unreviewed
Survey
Site Name:
Kelly's Run Site 2
Province/State:
Pennsylvania
Event Date:
2026-08-19
Time of Day:
Night-Time
Start Time:
19:50
End Time:
21:10
Number of Observers:
2
Primary Observer:
Lisa Zimmerman
Additional Observers:
Mara Zimmerman
target_species_genus:
unknown
target_species_species:
unknown
Location and Habitat
Location Accuracy (meters):
25-50
Habitat Type:
Grassland/Meadow - Meadow, open, grasses dominant
Habitat Type Notes:
Elevation (meters):
211.7
Area Searched (hectares):
2.867
Artificial Light Sources
Vehicles: No
Street Lights: No
Buildings: No
Airplanes
Street Lights: No
Buildings: No
Airplanes
Artificial Light Types
Sky Glow (diffuse illumination in the sky): No
Light Trespass (light cast on surfaces beyond its intended target): No
Glare (bright light causing visual discomfort): No
Light Trespass (light cast on surfaces beyond its intended target): No
Glare (bright light causing visual discomfort): No
Artificial Light Notes:
Observation
Observation Type:
With Flash Data
Number Observed:
11-50
genus:
photinus
Species:
pyralis
Observation Notes:
The specimen's body length was 1.6cm long.
Specimen Voucher Number:
Flash Behavior
First Flash Time:
20:29
Last Flash Time:
21:00
First Flash Temp (F):
71.2
Last Flash Temp (F):
72.6
Flashes in Pattern:
1
Flash Color:
Yellow
Flash Pattern Period:
6.15
Flash Duration:
0.35
Flash Interval:
5.80
Male Height Zone:
Moderate (3-8 ft)
Flash Location:
Flashes mostly occurred above the high grass of the meadow and appeared higher than earlier in the season.
Male Flash Behavior:
Flashes consisted of single, J-shaped patterns with yellow coloring.
