Butterfly migration field data Georgia 1987

Home Ś Index to Field Studies Ś Current Directory Ś Tables: Ś I a, I b, I c, I d, I e Ś II a Ś III a Ś IV a Ś V a Ś VI a Ś VII a Ś VIII a Ś IX a Ś X a Ś XI a Ś XII a Ś XIII a Ś

Table I d - Page 4
Airport in Calhoun, Georgia; September 28, 1987;
(Magnetic Declination = 2°W: Subtract 2° for True Bearing, True Heading and True Wind Direction)

Num.

Species

Time

Flight Behavior

Weather

Field Notes

III

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

D. plexippus

11:03

150 m

soar

straight,
circle

level,
climb

290°

227°

119°

2.2 m/s

yes

Butterfly was started at 60 m soared straight until it encounted stronger lift, then gained altitude by soaring in circles.

D. plexippus

11:08

60 m

soar

circle,
straight

climb

286°

(left)

111°

2.2 m/s

yes

D. plexippus

11:15

50 m

soar

circle,
straight,
circle

climb

293°

left

132°

2.2 m/s

yes

Butterfly started at 30 m and climbed by alternating between circling and straight flight.

Phoebis
sennae

11:18

2 m

flap

straight

level

158°

144°

2.7 m/s

40%
cumulus

Common name = Giant cloudless sulphur. Three foraging J. coenia and a second P. sennae were also seen.

D. plexippus

11:27

3 m

flap,
soar,
flap

straight,
circle,
straight

climb,
level,
descend

276°

230°

130°

0.4 m/s

yes

Butterfly was was flying near the near the ground when it flapped up to 3 m, soared in circles for awhile, then flapped back down.

D. plexippus

11:27

200 m

soar

circle

climb

yes

I lost sight of the butterfly in the haze. An Agraulis vanillae (Gulf fritillary) was seen foraging.

D. plexippus

11:30

100 m

soar

circle,
straight

climb,
level

277°

127°

2.0 m/s

yes

Butterfly started at 30 m, circled up to 100 m, then leveled off and flew straight.

D. plexippus

11:35

60 m

soar

circle

climb

273°

150°

3.6 m/s

yes

A foraging J. coenia and a Pantala flavescens were seen.