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Observation: Unknown
Primary Observer:
Christopher Scott
Event Date:
2025-07-15
Status:
Unverified
Survey
Site Name:
Power lines
Province/State:
Delaware
Event Date:
2025-07-15
Time of Day:
Night-Time
Start Time:
20:30
End Time:
20:45
Number of Observers:
2
Primary Observer:
Christopher Scott
Additional Observers:
Amelia Scott
Target Species Genus:
Target Species Species:
Location and Habitat
Location Accuracy (meters):
100-250
Habitat Type:
Developed - Sub/urban areas; parks/gardens
Habitat Type Notes:
Elevation (meters):
100
Area Searched (hectares):
.1
Artificial Light Sources
Vehicles: No
Street Lights: No
Buildings: Yes
House lights. Mo street lamps.
Street Lights: No
Buildings: Yes
House lights. Mo street lamps.
Artificial Light Types
Sky Glow (diffuse illumination in the sky): No
Light Trespass (light cast on surfaces beyond its intended target): No
Glare (bright light causing visual discomfort): No
Light Trespass (light cast on surfaces beyond its intended target): No
Glare (bright light causing visual discomfort): No
Artificial Light Notes:
Right of way under power lines in suburban neighborhood.
Observation
Observation Type:
Flashing
Number Observed:
50+
Genus:
unknown
Species:
unknown
Observation Notes:
Over 300 observed.
Specimen Voucher Number:
Flash Behavior
First Flash Time:
20:30
Last Flash Time:
20:45
First Flash Temp (F):
81
Last Flash Temp (F):
81
Flashes in Pattern:
1
Flash Color:
Yellow
Flash Pattern Period:
8
Flash Duration:
1
Flash Interval:
8
Male Height Zone:
Low (0-3 ft)
Flash Location:
Near the ground
Male Flash Behavior:
Female Flash Behavior:
1 thought on “Observation: Unknown”
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Thank you for submitting this firefly observation! Based on the yellow color, early evening timing, and low height of the flashes, I suspect that you might have been seeing big dipper fireflies (Photinus pyralis), but it is hard to confirm without photos of the firefly up close.