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left arrowarrow leftTable IV b  -  Page 9
University of Toronto at Mississauga, Mississauga, Ontario;  September 16, 1998;
Coordinates = 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 Behavior 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 - 9:44 - - - - - - 120   18.0C yes Clear Variable winds indicate thermals.
1 D. plexippus 9:52 100 m flap,
soar
straight level 242 left 128   18.0C yes Clear

Butterfly was mainly soaring.  No gulls of other birds.

2 D. plexippus 10:00 100 m flap,
soar,
glide
straight,
circle,
straight
level,
climb,
descend
253 182 127   18.0C yes Clear

Butterfly flew along, flapping weakly, encountered a thermal, circled and climbed, then left the thermal and glided.

3

D. plexippus

10:07 150 m flap,
glide,
soar
straight,
circle
level,
descend,
climb
296 - 141   18.5C yes Clear Butterfly was gliding down, with a few flaps, encountered a thermal and turned haphazardly as it soared and climbed. 

4

D. plexippus

10:14 150 m soar straight level 264 190 118   18.0C yes Clear Butterfly soared staight until it vanished.  No birds in sky.

Quit

- 10:30 - - - - - - 108   18.5C yes Clear Obvious thermal activity has started.  A pair of   sharp-shinned hawks are soaring.  No monarch butterflies were seen during a   check of goldenrod starting at 10:33