Observation: Unknown
Primary Observer:
Rainey Miller
Event Date:
2025-06-29
Status:
Unverified
Survey
Site Name:
Madera Canyon
Province/State:
Texas
Event Date:
2025-06-29
Time of Day:
Night-Time
Start Time:
21:45
End Time:
22:25
Number of Observers:
2
Primary Observer:
Rainey Miller
Additional Observers:
Stephen Hummel
I estimated the temperature and humidity.
target_species_genus:
photuris
target_species_species:
falli
Location and Habitat
Location Accuracy (meters):
500-1000
Habitat Type:
Riparian - Areas Along lake or stream
Habitat Type Notes:
Pinyon, juniper, and oak trees, tall grass
Elevation (meters):
1798
Area Searched (hectares):
0.3
Artificial Light Sources
Vehicles: No
Street Lights: No
Buildings: No
Headlamps
Street Lights: No
Buildings: No
Headlamps
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:
We wore headlamps with red lights.
Observation
Observation Type:
Without Flash Data
Number Observed:
1
genus:
unknown
Species:
unknown
Observation Notes:
Saw a single glowworm at 9:49. It had a steady, greenish-yellow glow. It was located in the grass at 30.7072670, -104.1028035. There were a lot of brambles in the way, so I didn't get close enough to it to take photos or collect it.
Specimen Voucher Number:
Flash Behavior
First Flash Time:
Last Flash Time:
First Flash Temp (F):
Last Flash Temp (F):
Flashes in Pattern:
Flash Color:
Flash Pattern Period:
Flash Duration:
Flash Interval:
Male Height Zone:
Flash Location:
Male Flash Behavior:
Female Flash Behavior:
1 thought on “Observation: Unknown”
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Interesting observation! Glow-worms on the ground like this could be the adult female of a glow-worm type firefly (Pleotomus or Microphotus), the flightless female of Photinus stellaris, or the larva of any firefly species found in the area.