Observation: Photinus pyralis
Primary Observer:
Debi Domby
Event Date:
2024-07-30
Status:
Verified
Survey
Site Name:
Home Backyard
Province/State:
Michigan
Event Date:
2024-07-30
Time of Day:
Night-Time
Start Time:
21:00
End Time:
21:19
Number of Observers:
1
Primary Observer:
Debi Domby
Additional Observers:
Target Species Genus:
Photinus
Target Species Species:
pyralis
Location and Habitat
Location Accuracy (meters):
0-25
Habitat Type:
Developed - Sub/urban areas; parks/gardens
Habitat Type Notes:
It had rained about 6 hours prior. With the heat today, pretty much dried up. Only mention this because traditionally for me, rain within 6 hours knock down the number of FF I get
Elevation (meters):
176.784
Area Searched (hectares):
.000464515
Artificial Light Sources
Vehicles: No
Street Lights: Yes
Buildings: No
Street Lights: Yes
Buildings: No
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:
Observation
Observation Type:
Flashing
Number Observed:
11-50
Genus:
Photinus
Species:
pyralis
Observation Notes:
In 10 second timing...number of FF: 12, 10, 9.
Colors: Red/Orange, green, white
At this time of year, once the cicadas start singing, the FF don't stay in one area for long where you can time the time between flashes. They're in one spot and then gone, where as earlier summer, I suspect in the 10 sec timings, the same one is counted up to 3 times.
Has anyone ever likened counting FF to doing a vision field test, where you keep your eyes facing forward and try to find as many light flashes around you. Think that was great training to counting FFs.
Specimen Voucher Number:
Flash Behavior
First Flash Time:
20:53
Last Flash Time:
21:20
First Flash Temp (F):
79
Last Flash Temp (F):
79
Flashes in Pattern:
1
Flash Color:
Green
Flash Pattern Period:
5.15
Flash Duration:
.75
Flash Interval:
5.85
Male Height Zone:
Low (0-3 ft), Moderate (3-8 ft)
Flash Location:
Mowed backyard
Note: flash intervals: 5.15-5.85 secs
