Observation: Unknown
Primary Observer:
Evan
Event Date:
2025-06-29
Status:
Unverified
Survey
Site Name:
Undisclosed
Province/State:
Ohio
Event Date:
2025-06-29
Time of Day:
Night-Time
Start Time:
21:50
End Time:
22:00
Number of Observers:
1
Primary Observer:
Evan
Additional Observers:
Na
target_species_genus:
unknown
target_species_species:
Location and Habitat
Location Accuracy (meters):
0-25
Habitat Type:
Grassland/Meadow - Meadow, open, grasses dominant
Habitat Type Notes:
Fescue Grass Plants
Elevation (meters):
1050
Area Searched (hectares):
3 Acres
Artificial Light Sources
Vehicles: Yes
Street Lights: Yes
Buildings: Yes
Homes
Street Lights: Yes
Buildings: Yes
Homes
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:
2-10
genus:
unknown
Species:
unknown
Observation Notes:
Witnessed 5-6 sync and flash syncronized for about 30 seconds
This is the 2-3 time this summer I've witnessed them flash in-sync the first time I wasnt sure if I saw it right or not.
Also watched one hold it's light on very dim and keep it on. Possibly a birth defect, I don't know. It would still flash brightly.
Specimen Voucher Number:
Flash Behavior
First Flash Time:
21:55
Last Flash Time:
21:55
First Flash Temp (F):
79
Last Flash Temp (F):
79
Flashes in Pattern:
2
Flash Color:
Green
Flash Pattern Period:
4
Flash Duration:
1
Flash Interval:
30
Male Height Zone:
Moderate (3-8 ft), High (over 8 ft)
Flash Location:
Just outside some tall pines
Male Flash Behavior:
Syncing lights with 1 or 2 others. Then 3-4 of them together and then 5-6 of them together at the same time.
Flashes occured multiple times over 30 seconds
Then the grouping dissipated
Female Flash Behavior:
1 thought on “Observation: Unknown”
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Thank you for submitting this firefly observation! Without a photo of the firefly, it is tricky to reach a species identification, but it is great to know that this site supports fireflies! And how cool that you witnessed the synchronization behavior!
A note about flash pattern terminology, for next firefly season:
“Flash pattern period” refers to the number of seconds between the start of a flash pattern and the start of the next repetition of that flash pattern. For example, the big dipper firefly (Photinus pyralis) typically has a flash pattern period of 5-7 seconds.
“Flash duration” is how long each flash lasts. Usually this is too fast to measure accurately, but you can estimate whether it is more or less than 0.5 seconds, you can enter “not recorded,” or you can do a verbal description (such as “very brief”).