Observation: Photinus pyralis
Primary Observer:
Roger
Event Date:
2026-07-10
Status:
Unreviewed
Survey
Site Name:
Rocktown
Province/State:
Illinois
Event Date:
2026-07-10
Time of Day:
Night-Time
Start Time:
20:50
End Time:
21:00
Number of Observers:
1
Primary Observer:
Roger
Additional Observers:
NA
target_species_genus:
photinus
target_species_species:
pyralis
Location and Habitat
Location Accuracy (meters):
>1000
Habitat Type:
Developed - Sub/urban areas; parks/gardens
Habitat Type Notes:
Elevation (meters):
623
Area Searched (hectares):
1
Artificial Light Sources
Vehicles: No
Street Lights: No
Buildings: Yes
Street Lights: No
Buildings: Yes
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:
1
genus:
photinus
Species:
pyralis
Observation Notes:
Specimen Voucher Number:
Flash Behavior
First Flash Time:
20:50
Last Flash Time:
21:00
First Flash Temp (F):
78
Last Flash Temp (F):
78
Flashes in Pattern:
1
Flash Color:
Yellow
Flash Pattern Period:
1
Flash Duration:
1
Flash Interval:
6 seconds
Male Height Zone:
Moderate (3-8 ft)
Flash Location:
only one firefly left flashing - about 8 feet high
