  Table III b - Page 5
University of Toronto at Mississauga, Mississauga, Ontario; September 12, 1998;
Magnetic Declination = 10°W (Subtract 10° for True);
Observer: David Gibo |
| Num. |
Species |
Time |
Flight Behaviour |
Weather |
Field Notes |
| I |
II |
III |
IV |
Va |
Vb |
Part 1 |
Part 2 |
Part 3 |
Est.
Alt. |
Type
of Flt. |
Horiz.
Path |
Vert.
Path |
Mag.
Bear. |
Mag.
Head. |
Wind
Dir. |
Wind
Vel. |
Amb.
Temp. |
Thrm.
Act. |
Cloud
Types |
| 5 |
A. junius |
2:46 |
200 m |
flap |
straight
forage |
level
forage |
251° |
right |
calm |
- |
27.0°C |
no |
100%
strato-
cumulus |
Dragonfly flew into a huge group of A. junius, apparently
flying in a thermal. Sun was breaking though clouds. |
| 6 |
A. junius |
2:50 |
200 m |
flap |
straight
forage |
level
forage |
247° |
- |
calm |
- |
26.5°C |
no |
100%
strato-
cumulus |
As many as 20 A. junius
flew through the field of vision. Sun was gone again. |
| 7 |
A. junius |
2:53 |
200 m |
flap |
straight
forage |
level
forage |
251° |
right |
calm |
- |
26.5°C |
no |
100%
strato-
cumulus |
Large numbers were streaming though
the field of vision. Except for lower, foraging individuals, the dragonflies were
still largely invisible unless sky was examined with binoculars. |
| 8 |
A. junius |
2:56 |
300 m |
flap |
straight
forage |
level
forage |
279° |
- |
calm |
- |
26.5°C |
yes |
100%
strato-
cumulus |
Many more were in the field of view - most flying straight.
Gulls were also hawking for insects. |
9 |
D. plexippus |
3:01 |
200 m |
soar,
glide |
straight,
variable,
circle |
level,
descend,
climb |
250° |
(right) |
calm |
- |
26.5°C |
yes |
100%
strato-
cumulus |
Butterfly soared and glided along, adjusting and working lift, but
generally losing altitude. It then encountered a patch of stronger lift and
circled upward for awhile. Finally, it left the lift and continued soaring and
glided straight while, on average, losing altitude. An A. junius and a
possible Tramea lacerata were
also seen |