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¦ Tables: ¦ I a ¦ II a ¦ III a ¦ IV a ¦ V a ¦ VI a ¦ VII a ¦ VIII a ¦ IX a ¦ X a,
X
b, X c, X d,
X
e, X f, X g,
X
h, X i, X j,
X
k, X l, X m, X n
¦ XI a ¦ XII a ¦ XIII a ¦
 Table X m - Page 81
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 |
- |
- |
4:32 |
- |
- |
- |
- |
- |
- |
- |
- |
- |
yes |
- |
WW: Radar showed that there were multiple
targets in a thermal that was 1.6 km in diameter and 1.6 km high. |
- |
- |
4:35 |
- |
- |
- |
- |
- |
- |
- |
- |
- |
yes |
- |
Vultures were soaring. |
- |
- |
4:43 |
- |
- |
- |
- |
- |
- |
- |
- |
- |
- |
- |
WW: A blue sky thermal (no cumulus cloud) was
approaching. |
382 |
D. plexippus |
4:48 |
30 m |
soar |
circle |
level |
103° |
- |
340° |
2.2 m/s |
- |
yes |
- |
Butterfly drifted downwind while soaring in circles at
30 m. A swift approached the butterfly then turned away. |
383 |
D. plexippus |
4:53 |
7 m |
soar,
glide,
soar |
circle,
straight,
circle |
descend,
climb |
140° |
right |
318° |
1.8 m/s |
- |
yes |
- |
John Westbrook's observation: Butterfly was
circling in a thermal when it left and glided down to 7 m, encountered a second thermal,
began to circle and soar again and climbed to 12 m. Vultures were soaring |
384 |
D. plexippus |
5:04 |
15 m |
soar |
circle,
straight,
circle |
level |
157° |
210° |
323° |
2.2 m/s |
- |
yes |
- |
Alton Spark's observation: Butterfly soared in
circles and soared straight, but stayed at the same altitude. John Westbrook
reported that air sonde measured an ambient temperature of 2 °C at an altitude of 2 km . |