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

left arrowarrow leftTable VII a  -  Page 47
Airport in Calhoun, Georgia;  October 4, 1987;    
(Magnetic Declination = 2°W:  Subtract 2° for True Bearing, True Heading and True Wind Direction)
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.
Flt.		 Vert.
Flt.		 Mag.
Bear.		 Mag.
Head.		 Wind
Dir.		  Wind 
Vel.		 Amb.
Temp		 Thrm.
Act.		 Cloud 
Types 
- - 7:38 - - - - - - calm - 7.5°C - - No activity was detected during approximately 5 minute scans at the open area near the motel in Calhoun.
- - 8:40 - - - - - - NW - 10.5°C - -
Start - 9:06 - - - - - - - - - - - High scans through binoculars were not productive.
261 D. plexippus 9:10 20 m flap,
soar		 straight,
circle		 level,
climb		 222° 224° 356° 2.9 m/s 12.5°C yes none Butterfly was flapping straight and level, when it encountered a thermal, switched to circling and soaring, and began gaining altitude.  Another D. plexippus was seen flying at about the same altitude.  High scans were not productive.  Swifts were flapping.
262 D. plexippus 9:22 50 m soar circle,
variable		 level,
climb		 173° - 012° 3.4 m/s - yes - Butterfly was circling and soaring at 30 m, but not gaining altitude.  It then switched to variable flight, encountered, or located, a region of stronger lift, began circle, and rapidly gained altitude.  Two more D. plexippus were also seen, one flying higher and and one flying lower.
263 D. plexippus 9:28 30 m soar,
(flap)		 circle,
straight,
variable		 level,
climb		 182° 237° 350° 3.1 m/s - yes - Butterfly started at 20 m soared in circles a few times in an area of weak lift without gaining altitude. It then switched to variable flight, including some flapping, encountered or located a patch of stronger lift , began to soar in circles and gain altitude.