Observation: Photuris forresti
Primary Observer:
Richard Joyce
Event Date:
2022-06-01
Status:
Verified
Survey
Site Name:
Harris Shoals Park, Watkinsville
Province/State:
Georgia
Event Date:
2022-06-01
Time of Day:
Night-Time
Start Time:
20:45
End Time:
22:50
Number of Observers:
3
Primary Observer:
Richard Joyce
Additional Observers:
Gordon Ward, Rob Tiffin
target_species_genus:
photuris
target_species_species:
forresti
Location and Habitat
Location Accuracy (meters):
25-50
Habitat Type:
Open Freshwater Wetland - Wetland Bog, fen, freshwater marsh
Habitat Type Notes:
Shrubby marsh upstream from a dam on Call's Creek. Flora include alder, red maple, arrow arum, and jewelweed.
Elevation (meters):
200
Area Searched (hectares):
0.5
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): Yes
Glare (bright light causing visual discomfort): Yes
Light Trespass (light cast on surfaces beyond its intended target): Yes
Glare (bright light causing visual discomfort): Yes
Artificial Light Notes:
Only skyglow in wetland interior. Trespass and glare from houses and streetlights at the edges.
Observation
Observation Type:
With Flash Data
Number Observed:
11-50
genus:
photuris
Species:
forresti
Observation Notes:
Captured male estimated to be 12-13 mm long (using 5 mm gridded paper).
Specimen Voucher Number:
Flash Behavior
First Flash Time:
21:20
Last Flash Time:
22:37
First Flash Temp (F):
77
Last Flash Temp (F):
77
Flashes in Pattern:
>4
Flash Color:
Green
Flash Pattern Period:
Longer than could be easily measured (>20 sec)
Flash Duration:
0.4 seconds
Flash Interval:
0.6
Male Height Zone:
Low (0-3 ft), Moderate (3-8 ft)
Flash Location:
Male flashes were above the wetland vegetation, especially in the slightly more open area downstream from the middle of the boardwalk. Flashes of presumed females were from foliage of vegetation (including willows) at heights of 2-8 feet. Voice recordings used to estimate flash intervals, and flash durations estimated based on flash intervals.
Male Flash Behavior:
Vertical up-and-down flash-trains with 5-7 flashes. Estimated "around a dozen" males displaying around the boardwalk.
Female Flash Behavior:
Female Photuris observed flashing erratically from vegetation, but these flashes were presumably not flash responses to male displays.
Status Changes
| DATE | USER | STATUS |
|---|---|---|
| 2022-06-30 19:35:25 | Richard Joyce | unreviewed->verified |
| 2022-06-29 19:44:26 | Richard Joyce | ->unreviewed |
