Observation: Photinus knulli
Primary Observer:
Tony Palmer
Event Date:
2024-09-26
Status:
Verified
Survey
Site Name:
Tumacacori National Historical Park, Santa Cruz River
Province/State:
Arizona
Event Date:
2024-09-26
Time of Day:
Night-Time
Start Time:
19:17
End Time:
20:30
Number of Observers:
2
Primary Observer:
Tony Palmer
Additional Observers:
Susan Palmer
target_species_genus:
photinus
target_species_species:
knulli
Location and Habitat
Location Accuracy (meters):
100-250
Habitat Type:
Riparian - Areas Along lake or stream
Habitat Type Notes:
Fremont’s cottonwood, Mesquite, Johnsongrass, Ambrosia and common sunflower.
Elevation (meters):
701.04
Area Searched (hectares):
129
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:
Light domes from Nogales and Sahuarita/Green Valley
Observation
Observation Type:
With Flash Data
Number Observed:
11-50
genus:
photinus
Species:
knulli
Observation Notes:
Still small groups of males and stray females active by the Santa Cruz River. 17 individuals observed during survey.
Specimen Voucher Number:
Flash Behavior
First Flash Time:
19:20
Last Flash Time:
19:45
First Flash Temp (F):
69.2
Last Flash Temp (F):
68.4
Flashes in Pattern:
3
Flash Color:
Green
Flash Pattern Period:
9-12
Flash Duration:
Less than 1
Flash Interval:
1.5
Male Height Zone:
Low (0-3 ft), Moderate (3-8 ft)
Flash Location:
In the tall weeds and just below the canopies of the cottonwoods
Male Flash Behavior:
Males flashing triplets from low grass to the lowest parts of the canopy (~24 meters). Females flashing from grasses and low shrubs.
• fireflyatlas.org
Female Flash Behavior:
Sporadic flashes and glows from low in the vegetation.
