Notice: Below is a list of 0 important links included on this page.
Please note that while screen readers have made significant strides, they may still lack full support for optimal web accessibility.
Observation: Photinus
Primary Observer:
Llew Williams
Event Date:
2025-07-12
Status:
Unverified
Survey
Site Name:
South Heidelberg
Province/State:
Pennsylvania
Event Date:
2025-07-12
Time of Day:
Night-Time
Start Time:
20:34
End Time:
20:43
Number of Observers:
3
Primary Observer:
Llew Williams
Additional Observers:
Lauren Williams
Isla Williams
Target Species Genus:
Target Species Species:
Location and Habitat
Location Accuracy (meters):
0-25
Habitat Type:
Grassland/Meadow - Meadow, open, grasses dominant
Habitat Type Notes:
Grassland surrounded by forest
Elevation (meters):
165
Area Searched (hectares):
1
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): 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:
Observation
Observation Type:
Flashing
Number Observed:
2-10
Genus:
Photinus
Species:
unknown
Observation Notes:
Specimen Voucher Number:
Flash Behavior
First Flash Time:
20:35
Last Flash Time:
21:08
First Flash Temp (F):
82
Last Flash Temp (F):
80
Flashes in Pattern:
1
Flash Color:
Yellow
Flash Pattern Period:
1
Flash Duration:
.5
Flash Interval:
3
Male Height Zone:
Low (0-3 ft)
Flash Location:
Lawn & woods
Male Flash Behavior:
Female Flash Behavior:
1 thought on “Observation: Photinus”
Leave a Comment
You must be logged in to post a comment.
Thanks for submitting this firefly observation! Based on the yellow flash color and the early-evening display time, this is likely a firefly in the genus Photinus, but it is hard to confirm for certain without photos of the firefly up close.