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Observation: Photinus pyralis
Primary Observer:
Debi Domby
Event Date:
2025-06-25
Status:
Unreviewed
Survey
Site Name:
Home Backyard
Province/State:
Michigan
Event Date:
2025-06-25
Time of Day:
Night-Time
Start Time:
21:30
End Time:
21:45
Number of Observers:
1
Primary Observer:
Debi Domby
Additional Observers:
na
Target Species Genus:
Photinus
Target Species Species:
pyralis
Location and Habitat
Location Accuracy (meters):
0-25
Habitat Type:
Developed - Sub/urban areas; parks/gardens
Habitat Type Notes:
mowed grass
Elevation (meters):
176.784
Area Searched (hectares):
.000464515
Artificial Light Sources
Vehicles: No
Street Lights: Yes
Buildings: No
Street Lights: Yes
Buildings: No
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): No
Light Trespass (light cast on surfaces beyond its intended target): Yes
Glare (bright light causing visual discomfort): No
Artificial Light Notes:
na
Observation
Observation Type:
Flashing
Number Observed:
50+
Genus:
Photinus
Species:
pyralis
Observation Notes:
Again the estimate is 80-85 for the 15 second reading. Saw a couple do J turns and they were again flashing in a pattern.
Heat Index was 76.
Specimen Voucher Number:
Flash Behavior
First Flash Time:
21:30
Last Flash Time:
21:45
First Flash Temp (F):
73.9
Last Flash Temp (F):
73.9
Flashes in Pattern:
1
Flash Color:
Green
Flash Pattern Period:
3.0-3.75
Flash Duration:
maybe a second
Flash Interval:
3.0-3.75
Male Height Zone:
Moderate (3-8 ft)
Flash Location:
Colors seen: mostly green/yellow, some white and orange/red
They were flashing a little slower today.
Male Flash Behavior:
na
Female Flash Behavior:
na
