Observation: Photinus pyralis
Primary Observer:
Vincent Spaid
Event Date:
2026-07-08
Status:
Unreviewed
Survey
Site Name:
Brooklyn Center
Province/State:
Minnesota
Event Date:
2026-07-08
Time of Day:
Night-Time
Start Time:
20:45
End Time:
22:01
Number of Observers:
2
Primary Observer:
Vincent Spaid
Additional Observers:
Sara Spaid
target_species_genus:
target_species_species:
Location and Habitat
Location Accuracy (meters):
0-25
Habitat Type:
Developed - Sub/urban areas; parks/gardens
Habitat Type Notes:
"Wild" area at back of residential yard. Has deep leaf litter, ferns, blue spruce, and some kind of plant with lots of "stickers".
Elevation (meters):
261
Area Searched (hectares):
0.1
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:
With Flash Data
Number Observed:
2-10
genus:
photinus
Species:
pyralis
Observation Notes:
~13 mm in length
Specimen Voucher Number:
Flash Behavior
First Flash Time:
21:30
Last Flash Time:
21:44
First Flash Temp (F):
73
Last Flash Temp (F):
71.4
Flashes in Pattern:
1
Flash Color:
Yellow
Flash Pattern Period:
5 to 7
Flash Duration:
~0.3
Flash Interval:
5 to 7
Male Height Zone:
Moderate (3-8 ft)
Flash Location:
Flashing occurred over residential lawns.
Male Flash Behavior:
Swooping upward flashing lasting somewhere between 0.2 and 0.5 seconds at a height of 5 to 6 feet over manicured lawns. They moved 10 to 20 feet between flashes.
