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Observation: Unknown
Primary Observer:
Abby Marshall
Event Date:
2025-07-27
Status:
Unverified
Survey
Site Name:
The Presidio
Province/State:
Texas
Event Date:
2025-07-27
Time of Day:
Night-Time
Start Time:
22:40
End Time:
22:41
Number of Observers:
1
Primary Observer:
Abby Marshall
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:
There have been grasses planted, most of which are five feet tall right now. Opens to pasture with less grass, but some.
Elevation (meters):
4700
Area Searched (hectares):
1
Artificial Light Sources
Vehicles: No
Street Lights: Yes
Buildings: Yes
Street Lights: Yes
Buildings: Yes
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:
Observation
Observation Type:
Flashing
Number Observed:
1
Genus:
unknown
Species:
unknown
Observation Notes:
The lightning bug flew by rather quickly in a straight line flashing every second or half second.
Specimen Voucher Number:
Flash Behavior
First Flash Time:
22:40
Last Flash Time:
22:41
First Flash Temp (F):
72
Last Flash Temp (F):
72
Flashes in Pattern:
>4
Flash Color:
Yellow
Flash Pattern Period:
10
Flash Duration:
1
Flash Interval:
1
Male Height Zone:
High (over 8 ft)
Flash Location:
Flew several feet over the grasses which are 5-6 feet tall.
Male Flash Behavior:
Constant flashing as he flew by.
Female Flash Behavior:
None
1 thought on “Observation: Unknown”
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Thank you for submitting this intriguing firefly observation! Without a photo of the beetle up close, it is difficult to confirm what type it was. In this region, there are a few other species of flashing firefly (including the starry firefly, Photinus stellaris) and the Texas glowing click beetle (Deilelater physoderus), which is also bioluminescent. So we unfortunately can’t assume that the beetle observed was a sky island firefly (Photuris falli, formerly Photuris flavicollis).