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Observation: Photinus pyralis
Primary Observer:
Debi Domby
Event Date:
2025-06-24
Status:
Unreviewed
Survey
Site Name:
Home Backyard
Province/State:
Michigan
Event Date:
2025-06-24
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:
Fireflies again were covering the neighbors backyard. I estimate, like last night, 80-85+ fireflies. Like last night saw some J, and groups of fireflies flashing in an order over and over.
Specimen Voucher Number:
Flash Behavior
First Flash Time:
21:30
Last Flash Time:
21:45
First Flash Temp (F):
79
Last Flash Temp (F):
79
Flashes in Pattern:
1
Flash Color:
Green
Flash Pattern Period:
2.75-3.50
Flash Duration:
aprox half sec
Flash Interval:
2.75-3.5
Male Height Zone:
Moderate (3-8 ft)
Flash Location:
Colors seen. mostly green/yellow but also some white and orange/red
Don't know about males height, but the fireflies were about 3-5 ft off the ground
Male Flash Behavior:
na
Female Flash Behavior:
na
