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Observation: Photinus pyralis
Primary Observer:
Ed Chapman
Event Date:
2025-06-04
Status:
Unreviewed
Survey
Site Name:
Rutgers commons near Seminary Place
Province/State:
New Jersey
Event Date:
2025-06-04
Time of Day:
Night-Time
Start Time:
20:00
End Time:
20:30
Number of Observers:
2
Primary Observer:
Ed Chapman
Additional Observers:
Norma Hoffman
Target Species Genus:
unknown
Target Species Species:
Location and Habitat
Location Accuracy (meters):
0-25
Habitat Type:
Developed - Sub/urban areas; parks/gardens
Habitat Type Notes:
Mowed grass, oaks, maples, cherry, large and small trees.
Elevation (meters):
65
Area Searched (hectares):
2 acres
Artificial Light Sources
Vehicles: No
Street Lights: Yes
Buildings: Yes
Street Lights: Yes
Buildings: Yes
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): No
Light Trespass (light cast on surfaces beyond its intended target): Yes
Glare (bright light causing visual discomfort): No
Artificial Light Notes:
Observation
Observation Type:
Flashing
Number Observed:
50+
Genus:
Photinus
Species:
pyralis
Observation Notes:
Flashing started in the shadier areas, then spread as the sun set. Many more fireflies than in recent years.
Specimen Voucher Number:
Flash Behavior
First Flash Time:
20:00
Last Flash Time:
20:46
First Flash Temp (F):
78
Last Flash Temp (F):
78
Flashes in Pattern:
1
Flash Color:
Yellow
Flash Pattern Period:
1
Flash Duration:
1
Flash Interval:
8-10
Male Height Zone:
Moderate (3-8 ft)
Flash Location:
Flashes are in the mowed grass areas under trees. Most flashes 3-8 feet, but some up to 10-15 feet high.
Male Flash Behavior:
Flying, moving.
Female Flash Behavior:
Stationary.
