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Observation: Photinus pyralis
Primary Observer:
Ed Chapman
Event Date:
2025-07-11
Status:
Verified
Survey
Site Name:
13 Hardenberg St., New Brunswick
Province/State:
New Jersey
Event Date:
2025-07-11
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:
Photinus
Target Species Species:
pyralis
Location and Habitat
Location Accuracy (meters):
0-25
Habitat Type:
Developed - Sub/urban areas; parks/gardens
Habitat Type Notes:
Mugwort, goldenrod, mustard, native and non-native "weeds"; oaks, maples, hackberry; fig trees, grape arbor; unmowed grass.
Elevation (meters):
69
Area Searched (hectares):
1/8 acre
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:
11-50
Genus:
Photinus
Species:
pyralis
Observation Notes:
Approximately 15-20; males flying, females stationary. Males are indiscriminate, flying all over the backyard.
Specimen Voucher Number:
Flash Behavior
First Flash Time:
20:00
Last Flash Time:
20:30
First Flash Temp (F):
82
Last Flash Temp (F):
82
Flashes in Pattern:
1
Flash Color:
Yellow
Flash Pattern Period:
6
Flash Duration:
1
Flash Interval:
5
Male Height Zone:
Moderate (3-8 ft)
Flash Location:
Males are indiscriminate, flashing all over the backyard. Females are stationary on leaves.
Male Flash Behavior:
One flash, then 5 seconds before the next one.
Female Flash Behavior:
One flash, then no flashes unless a male is nearby. Then females either flash or not, depending on, I suppose, whether or not they approve of the male firefly.
