Home ¦ Index to Field Studies ¦ Current Directory ¦ Tables: ¦ I a ¦ II a ¦ III a, III b, III c, III d ¦ IV a ¦
Table III a - Page 4 University of Toronto at Mississauga, Mississauga, Ontario; September 12, 1998; Co-ordinates = 43°33'N, 79°40'W; Altitude = 152 m; Magnetic Declination = 10°W (Subtract 10° for True); Magnetic Inclination = 72.30°; Observer: David Gibo |
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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 |
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Start | - | 2:25 | - | - | - | - | - | - | calm | - | 27.0°C | yes | 100% strato- cumulus |
Observations were made in a parking lot north of the South Building . Winds aloft were N. thermal activity was indicated by variable breezes. A huge migration of Anax junius was in progress. |
1 | 2:28 | 200 m | flap | straight | level | 298° | - | calm | - | 27.0°C | yes | 100% strato- cumulus |
Dragonfly flew straight except for episodes of several seconds when it deviated from its track (usually climbed) to capture a prey item. The air was full of small insects. |
|
2 | A, junius | 2:31 | 200 m | flap | straight forage |
level forage |
280° | right | calm | - | 27°.0C | - | 100% strato- cumulus |
Dragonfly flight behaviour was as above. At least 6 more were seen in my field of vision, some much higher. None are visible to unaided vision. |
3 | A, junius |
2:36 | 200 m | flap | straight forage |
level forage |
308° | - | calm | - | 27.0°C | no | 100% strato- cumulus |
Flight behaviour was as above. Gulls were flapping. Binoculars were necessary to see the migration. |
4 |
2:42 | 200 m | soar | straight variable |
level | 234° | right | calm | - | 27.0°C | yes | 100% strato- cumulus |
Butterfly frequently made small half turns and other minor adjustments of its flight path - perhaps searching for stronger lift. An A. juinius was also seen. |