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Observation: Photinus pyralis
Primary Observer:
Roger
Event Date:
2025-06-19
Status:
Unverified
Survey
Site Name:
Rocktown
Province/State:
Illinois
Event Date:
2025-06-19
Time of Day:
Night-Time
Start Time:
20:50
End Time:
21:05
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:
Maintained lawn, lots of tree and bushes. Some wild area.
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): 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:
Count was about 20 in bright, cloudless sky, changed to about 22 as it got darker
Specimen Voucher Number:
Flash Behavior
First Flash Time:
20:50
Last Flash Time:
21:05
First Flash Temp (F):
75
Last Flash Temp (F):
75
Flashes in Pattern:
1
Flash Color:
Yellow
Flash Pattern Period:
3-5
Flash Duration:
1
Flash Interval:
varied
Male Height Zone:
Moderate (3-8 ft)
Flash Location:
Some lower to the ground/grass but others were maybe 5 -6 feet high
Male Flash Behavior:
Single flash
