Observation: Photinus marginellus
Primary Observer:
Nicole Ferrari
Event Date:
2026-07-31
Status:
Unreviewed
Survey
Site Name:
kellys run-pollinator park
Province/State:
Pennsylvania
Event Date:
2026-07-31
Time of Day:
Night-Time
Start Time:
19:45
End Time:
21:10
Number of Observers:
2
Primary Observer:
Nicole Ferrari
Additional Observers:
Mark Krebs
target_species_genus:
unknown
target_species_species:
unknown
Location and Habitat
Location Accuracy (meters):
25-50
Habitat Type:
Developed - Sub/urban areas; parks/gardens
Habitat Type Notes:
native pollinator park maintained by a local conservancy at the edge of a wooded area, with grassy, mown walking paths
Elevation (meters):
213.8
Area Searched (hectares):
2.8
Artificial Light Sources
Vehicles: Yes
Street Lights: No
Buildings: Yes
Street Lights: No
Buildings: Yes
Artificial Light Types
Sky Glow (diffuse illumination in the sky): Yes
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:
the sky glow was significant enough to make any light trespassing from distant vehicles and home not ova much affect
Observation
Observation Type:
With Flash Data
Number Observed:
11-50
genus:
photinus
Species:
marginellus
Observation Notes:
this time they emerged more form the pollinator area versus before the had seemed to be more in the shadow of the woods, grasses at the tree bases. mostly inches above the 3-4ft high plants. still a little sporadic at the start of their flashing, not quite as rhythmic as they became 5-10minutes in to the flashing observation time
Specimen Voucher Number:
Flash Behavior
First Flash Time:
20:30
Last Flash Time:
21:02
First Flash Temp (F):
83
Last Flash Temp (F):
82.9
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:
inches about the ground as the merged, continued as they flitted around, never much higher than just afoot to so about the vegetation tops
Male Flash Behavior:
1 second flash, 5 seconds and then another single 1 second flash. consistently
