Observation: Photinus pyralis
Primary Observer:
Richard Joyce
Event Date:
2026-07-22
Status:
Survey
Site Name:
Jarvis Creek Preserve
Province/State:
Connecticut
Event Date:
2026-07-22
Time of Day:
Night-Time
Start Time:
20:21
End Time:
22:00
Number of Observers:
17
Primary Observer:
Richard Joyce
Additional Observers:
Katie Hietala-Henschell, Julie Michaelson, Heidi Richard, Bill McDonald, and others
target_species_genus:
unknown
target_species_species:
unknown
Location and Habitat
Location Accuracy (meters):
0-25
Habitat Type:
Grassland/Meadow - Meadow, open, grasses dominant
Habitat Type Notes:
Open meadow bordered by mixed forest, predominantly deciduous trees. The site was previously a corn field before being restored to a meadow.
Elevation (meters):
7
Area Searched (hectares):
0.2
Artificial Light Sources
Vehicles: Yes
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): Yes
Light Trespass (light cast on surfaces beyond its intended target): No
Glare (bright light causing visual discomfort): Yes
Artificial Light Notes:
Glare from cars driving on adjacent road was marginal.
Observation
Observation Type:
With Flash Data
Number Observed:
11-50
genus:
photinus
Species:
pyralis
Observation Notes:
11 mm. About 30 individuals. Flashing end time is an estimate, this flash patterns didn't occur throughout the entire survey period.
Specimen Voucher Number:
Flash Behavior
First Flash Time:
20:27
Last Flash Time:
21:30
First Flash Temp (F):
81
Last Flash Temp (F):
77
Flashes in Pattern:
1
Flash Color:
Yellow
Flash Pattern Period:
5.75
Flash Duration:
0.75
Flash Interval:
5
Male Height Zone:
Flash Location:
Flashing started in the shrubby strip along the parking lot. Flight was low and slow.
Male Flash Behavior:
Yellow flash about 0.75 seconds repeating every 4-6 seconds.
Female Flash Behavior:
Status Changes
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