Observation: Photinus obscurellus
Primary Observer:
Richard Joyce
Event Date:
2025-06-20
Status:
Verified
Survey
Site Name:
Dwelly Farm Conservation Area - Back Fields East
Province/State:
Massachusetts
Event Date:
2025-06-20
Time of Day:
Night-Time
Start Time:
20:44
End Time:
22:11
Number of Observers:
9
Primary Observer:
Richard Joyce
Additional Observers:
Nick R., Christy B., George B., Cynthia L., Jill R., Kathleen A., Susan G., Maria B.
target_species_genus:
unknown
target_species_species:
unknown
Location and Habitat
Location Accuracy (meters):
25-50
Habitat Type:
Grassland/Meadow - Meadow, open, grasses dominant
Habitat Type Notes:
Wet meadow (formerly a dairy pasture), with various grasses and sedges, goldenrod, and ferns.
Elevation (meters):
308
Area Searched (hectares):
0.3
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:
Minimal ALAN except for some sky glow.
Observation
Observation Type:
With Flash Data
Number Observed:
11-50
genus:
photinus
Species:
obscurellus
Observation Notes:
Specimen Voucher Number:
Flash Behavior
First Flash Time:
21:00
Last Flash Time:
22:11
First Flash Temp (F):
67
Last Flash Temp (F):
66
Flashes in Pattern:
3
Flash Color:
Yellow
Flash Pattern Period:
Not recorded
Flash Duration:
Brief, not recorded
Flash Interval:
0.3
Male Height Zone:
Low (0-3 ft), Moderate (3-8 ft)
Flash Location:
Over the field, mostly not too high above the herbaceous vegetation.
Male Flash Behavior:
Quick yellow triplets emitted either from the tips of the vegetation or flying 3-8 ft above the field.
Female Flash Behavior:
Not observed.
