Observation: Photinus pyralis
Primary Observer:
Katie Hietala-Henschell
Event Date:
2026-07-14
Status:
Survey
Site Name:
Lake Hudson Recreation Area
Province/State:
Michigan
Event Date:
2026-07-14
Time of Day:
Night-Time
Start Time:
21:15
End Time:
23:40
Number of Observers:
1
Primary Observer:
Katie Hietala-Henschell
Additional Observers:
NA
target_species_genus:
photinus
target_species_species:
aquilonius
Location and Habitat
Location Accuracy (meters):
0-25
Habitat Type:
Grassland/Meadow - Meadow, open, grasses dominant
Habitat Type Notes:
Early successional field with goldenrod, bee balm, wild teasel, and grasses. Small hunting shack along mowed path. Bordered by mixed deciduous forest and shrubs.
Elevation (meters):
261
Area Searched (hectares):
0.26
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:
11-50
genus:
photinus
Species:
pyralis
Observation Notes:
13 mm.
Specimen Voucher Number:
Flash Behavior
First Flash Time:
21:15
Last Flash Time:
23:15
First Flash Temp (F):
84
Last Flash Temp (F):
75
Flashes in Pattern:
1
Flash Color:
Yellow
Flash Pattern Period:
5.75
Flash Duration:
0.75
Flash Interval:
5
Male Height Zone:
Low (0-3 ft), Moderate (3-8 ft)
Flash Location:
Over the field and along forest edge.
Male Flash Behavior:
Swooping J-shaped flash lasting between 0.75-1 second followed by 5 second dark interval.
Female Flash Behavior:
Status Changes
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