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Observation: Photinus pyralis
Primary Observer:
Chris Andrews
Event Date:
2025-07-22
Status:
Unverified
Survey
Site Name:
Tamarack Ln
Province/State:
Michigan
Event Date:
2025-07-22
Time of Day:
Night-Time
Start Time:
21:00
End Time:
23:29
Number of Observers:
1
Primary Observer:
Chris Andrews
Additional Observers:
N/A
Target Species Genus:
Photinus
Target Species Species:
pyralis
Location and Habitat
Location Accuracy (meters):
0-25
Habitat Type:
Grassland/Meadow - Meadow, open, grasses dominant
Habitat Type Notes:
This is a country suburban type area, with large open farm land mixed with forest in places, with multiple ponds in many homes yards. Homes acres apart. Seen many in backyard that is sod type fesque grass with Kentucky bluegrass mixed, with typical clover field behind house with other mixed MI wild grasses. Tall Maples, Wild Cherry and pines around area.
Elevation (meters):
250
Area Searched (hectares):
3
Artificial Light Sources
Vehicles: No
Street Lights: No
Buildings: Yes
Street Lights: No
Buildings: Yes
Artificial Light Types
Sky Glow (diffuse illumination in the sky): No
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:
Country area, building lights only mostly, few cars.
Observation
Observation Type:
Flashing
Number Observed:
11-50
Genus:
Photinus
Species:
pyralis
Observation Notes:
Fireflies over and in trees, low over mowed lawns of homes. In my backyard. Flashing. Normal look to the insect, body length normal. Same amount over sod mowed lawns as in back cut wild fields. Have been seen since June. Also seen low to grass but 20ft up in wild cherry trees flashing and in maple tree. Has been here yearly for at least 10 years, about same number of 30-50 in area. They have not flashed synchronized though, mostly random and with some time between lights. Have seen them resting on window screen of house during the day too. Yellow abdomen noted. Black and red narrow body. (Did not stay up all night to get last flash time.) Most flashes looked yellow, but a few greenish.
Specimen Voucher Number:
Flash Behavior
First Flash Time:
21:30
Last Flash Time:
23:00
First Flash Temp (F):
75
Last Flash Temp (F):
73
Flashes in Pattern:
1
Flash Color:
Yellow
Flash Pattern Period:
1
Flash Duration:
1
Flash Interval:
20
Male Height Zone:
Low (0-3 ft), Moderate (3-8 ft), High (over 8 ft)
Flash Location:
In trees, over cut lawn, over nearby field.
Link here: https://www.facebook.com/share/v/1AxYk2mThZ/
Male Flash Behavior:
Curving streak, quickly occurs in mostly flying up position.
Female Flash Behavior:
Flash delay 20 to 30 seconds
