Observation: Photuris tremulans
Primary Observer:
Peggy Butler
Event Date:
2026-07-10
Status:
Unreviewed
Survey
Site Name:
Undisclosed
Province/State:
Pennsylvania
Event Date:
2026-07-10
Time of Day:
Night-Time
Start Time:
22:00
End Time:
22:30
Number of Observers:
2
Primary Observer:
Peggy Butler
Additional Observers:
Ken
target_species_genus:
photinus
target_species_species:
carolinus
Location and Habitat
Location Accuracy (meters):
0-25
Habitat Type:
Grassland/Meadow - Meadow, open, grasses dominant
Habitat Type Notes:
Also walked into the tree canopy.
Natural grasses and herbaceous plants, thistle, banes, weeds etc.
Tall mature trees (oak, maple, sycamore, hemlock) on the parameter of the open field
Elevation (meters):
356
Area Searched (hectares):
2
Artificial Light Sources
Vehicles: No
Street Lights: No
Buildings: No
Street Lights: No
Buildings: No
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:
Observation
Observation Type:
With Flash Data
Number Observed:
50+
genus:
photuris
Species:
tremulans
Observation Notes:
hundreds to thousands in the trees, bottom to top. Changed species from hebes to tremulans after further review with Faust book.
Specimen Voucher Number:
Flash Behavior
First Flash Time:
22:15
Last Flash Time:
22:30
First Flash Temp (F):
73
Last Flash Temp (F):
72
Flashes in Pattern:
1
Flash Color:
White
Flash Pattern Period:
1
Flash Duration:
<.1
Flash Interval:
1
Male Height Zone:
Low (0-3 ft), Moderate (3-8 ft), High (over 8 ft)
Flash Location:
Covering the trees bottom to top 30-50ft Trees
Male Flash Behavior:
single rapid flashes; appear to be sparkling like glitter in the trees
