Home ¦ Index to Field Studies ¦ Current Directory ¦ Tables: ¦ I a ¦ II a, II b, II c, II d, II e, II f ¦ III a ¦ IV a ¦ V a ¦ VI a ¦ VII a ¦ VIII a ¦ IX a ¦ X a ¦ XI a ¦ XII a ¦ XIII a ¦
![]() ![]() Airport in Calhoun, Georgia; September 29, 1987; (Magnetic Declination = 2°W: Subtract 2° for True Bearing, True Heading and True Wind Direction) |
||||||||||||||
Num. | Species | Time | Flight Behavior | Weather | Field Notes | |||||||||
I | II | III | IV | Va | Vb | Part 1 | Part 2 | Part 3 | ||||||
Est. Alt. |
Type of Flt. |
Horiz. Flt. |
Vert. Flt. |
Mag. Bear. |
Mag. Head. |
Wind Dir. |
Wind Vel. |
Amb. Temp |
Thrm. Act. |
Cloud Types |
||||
45 | D. plexippus | 10:18 | 60 m | glide, flap, soar |
straight, circle |
descend, climb |
310° | 250° | 127° | 6.0 m/s | - | yes | cumulus, fracto- cumulus |
Butterfly glided down from 20 m and began flapping, flapped up to a thermal over a tree, and circled and soared to 60 m. Two more D. plexippus and a J. coenia were also seen. |
46 | J. coenia | 10:31 | 30 m | flap | straight | descend | - | - | 148° | 5.1 m/s | - | yes | cumulus more defined |
Butterfly flapped down to 2 m. Vultures were soaring at 150 m. An Eurema nicippe (sleepy orange) was also seen. |
47 | D. plexippus | 10:38 | 10 m | glide, flap |
straight | descend, level |
320° | 270 | 170° | 6.0 m/s | - | - | - | Butterfly started at 10 m, glided down to 2 m, and began flapping. |
- | - | 10:48 | - | - | - | - | - | - | 145° | 4.0 m/s | - | - | - | - |
48 | D. plexippus | 10:50 | 6 m | soar, glide, flap |
straight | descend | 317° | 251° | 150° | 3.6 m/s | 24.5° | yes | - | Butterfly soared straight at 6 m then glided down close to the ground and began flapping. Vultures were soaring at 60 m. |
Break | - | 10:58 | - | - | - | - | - | - | - | - | - | - | - | - |
49 | D. plexippus | 2:30 | 1 m | flap | straight | level | 279° | left | 167° | 3.1 m/s | 26.5°C | yes | scattered cumulus |
Butterfly experienced pronounced wind-drift. Cumulus clouds appeared soft-edged, indicating weak lift. Vultures were soaring. |