Observation: Photinus pyralis
Primary Observer:
Jen Hunsinger
Event Date:
2026-06-26
Status:
Unreviewed
Survey
Site Name:
Home
Province/State:
Pennsylvania
Event Date:
2026-06-26
Time of Day:
Night-Time
Start Time:
20:30
End Time:
21:31
Number of Observers:
1
Primary Observer:
Jen Hunsinger
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:
Lots of tall trees in our backyard - most fireflies in trees were in the locust
Elevation (meters):
170.0784
Area Searched (hectares):
.0648001066
Artificial Light Sources
Vehicles: Yes
Street Lights: Yes
Buildings: Yes
Neighbor had an extra outdoor light on that was very bright and produced a lot of glare. This light is usually not on.
Street Lights: Yes
Buildings: Yes
Neighbor had an extra outdoor light on that was very bright and produced a lot of glare. This light is usually not on.
Artificial Light Types
Sky Glow (diffuse illumination in the sky): Yes
Light Trespass (light cast on surfaces beyond its intended target): Yes
Glare (bright light causing visual discomfort): Yes
Light Trespass (light cast on surfaces beyond its intended target): Yes
Glare (bright light causing visual discomfort): Yes
Artificial Light Notes:
See above - neighbor’s outdoor house light
Observation
Observation Type:
With Flash Data
Number Observed:
11-50
genus:
photinus
Species:
pyralis
Observation Notes:
Specimen Voucher Number:
Flash Behavior
First Flash Time:
20:30
Last Flash Time:
21:18
First Flash Temp (F):
74
Last Flash Temp (F):
71
Flashes in Pattern:
1
Flash Color:
Yellow
Flash Pattern Period:
About 7
Flash Duration:
About 1
Flash Interval:
About 6
Male Height Zone:
Low (0-3 ft), Moderate (3-8 ft)
Flash Location:
Flashing just above the grass, rising higher as time passed
Male Flash Behavior:
J shape flash
