 Table X j - Page 78
Airport in Calhoun, Georgia; October 7, 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 |
367 |
D. plexippus |
3:23 |
40 m |
flap,
soar,
glide |
straight,
circle,
straight |
climb,
level,
descend |
127° |
right |
320° |
6.7 m/s |
- |
yes |
- |
Butterfly started at 0.5 m, flapped up to a thermal,
began to circle and soar and climbed to 40 m, then left the thermal and glided back down
to about 1 m. |
368 |
D. plexippus |
3:41 |
15 m |
soar |
straight,
circle |
level,
climb |
134° |
230° |
320° |
4.5 m/s |
- |
yes |
- |
Butterfly was soaring level at 10 m when it
encountered stronger lift and climbed to 15 m. Three more D. plexippus were
seen, one of which was higher than the observed migrant. |
369 |
D. plexippus |
3:44 |
500 m |
flap,
soar |
straight,
circle |
level, climb |
149° |
225° |
321° |
6.3 m/s |
- |
yes |
- |
Butterfly was flapping along at 7 m when it
encountered thermal, began to soar in circles, and climbed cloudbase (500 m). John
Westbrook and Wayne Wolf used radar 'slaved' to the theodolite to track the butterfly for
1 km. Swifts were foraging. |
370 |
D. plexippus |
3:46 |
- |
glide |
straight |
descend |
- |
- |
- |
- |
- |
- |
- |
Butterfly glided straight into a tree and landed. |
371 |
D. plexippus |
3:47 |
100 m |
soar |
circle,
straight |
level |
153° |
224° |
307° |
2.2 m/s |
- |
yes |
- |
Butterfly started at 60 m and used both circling and
straight soaring flight to climb to 100 m before it vanished. |