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University of Toronto at Mississauga, Mississauga, Ontario;  September 1, 1998;
Co-ordinates = 4333'N, 7940'W;  Altitude = 152 m;  
Magnetic Declination = 10W (Subtract 10 for True);  Magnetic Inclination = 72.30;  
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 
Start - 10:00 - - - - - - SE - - yes 50%
cumulus
Observations were made in a parking lot north of the South Building
1

Danaus plexippus

10:02 300 m glide straight descend 300 left 150 1.3 m/s 23.0C yes 50%
cumulus

Butterfly started at 300 m and glided down to 200 m.  Two more D. plexippus were seen.  Both were flapping, one at 3 m and one at 10 m.

2 D. plexippus 10:09 300 m soar circle,
straight,
variable
climb - - calm - 24.0C yes 50%
cumulus

Butterfly was in a strong thermal centered over  the parking lot and vanished almost directly overhead as it climbed past 300 m.  

3

D. plexippus

10:17 300 m soar variable level 267 - calm - 22.0C yes 50%
cumulus
Butterfly turned (rotated it's heading) from one side to the other, resulting in an S shaped track - searching for stronger lift?  Lost a few minutes while demonstrated  how to watch migrating monarch butterflies to a Zoology Graduate Student.

4

D. plexippus

10:25 300 m soar,
glide,
flap
circle,
straight
variable
climb,
descend
215 right calm - 20.0C yes 50%
cumulus
Butterfly glided down, encountered a thermal and soared upward, then left the thermal and  glided to another.  It did this three times.  A swift (or swallow)  was also seen briefly in the field of view.

Descriptive Circular Statistics