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Observation: Photinus pyralis
Primary Observer:
Roger
Event Date:
2025-07-03
Status:
Unverified
Survey
Site Name:
Rocktown
Province/State:
Illinois
Event Date:
2025-07-03
Time of Day:
Night-Time
Start Time:
21:00
End Time:
21:15
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):
207
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): Yes
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:
Flashing
Number Observed:
11-50
Genus:
Photinus
Species:
pyralis
Observation Notes:
High humidity and muggy at sunset. Saw 31 when I started but it quickly became 38, which I think is one of my higher counts ever for this siste. There was a lot of double flashing and larger number higher than 8 feet, while many were just above ground level
Specimen Voucher Number:
Flash Behavior
First Flash Time:
21:00
Last Flash Time:
21:15
First Flash Temp (F):
80
Last Flash Temp (F):
80
Flashes in Pattern:
1
Flash Color:
Yellow
Flash Pattern Period:
2-4
Flash Duration:
1
Flash Interval:
1
Male Height Zone:
High (over 8 ft)
Flash Location:
Most just about groubnd level, some higher
