Tactics and Vectors 98/99
                           

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Great Circle Hypotheis  

Magnetoclinic Hypothesis

Magnetic-Latitude Hypothesis

Compass Bearings Hypothesis

Suns' Azimuth Hypothesis

Expansion-Contraction Hypothesis

Always Advance Hypothesis

Never Go Back Hypothesis

 

 

Analysis of Field Data for the 1988 Monarch Butterfly Migration in Resaca and Calhoun, Georgia

left arrowarrow leftTable IX b
Mean Vanishing bearing for Danaus plexippus in East Winds:   Data used in Calculations

September 26 - October 2, 1988 observations of the Danaus plexippus migration in Resaca and Calhoun, Georgia

Date 

Table

Number of
Observations

Field Data
Code Numbers

Reasons for
Exclusion

Sept.  26

   I       

-

-

 NA

27

 II       -

-

 NA
      28 III            3 (5)

96, 99, 126, 127, 128

Flying above the inversion.
29 IV      3

158, 184, 192

NA
30 V              -  (1)

238

No bearing
Oct.    1 VI      -

-

 NA
2 VII      -

-

 NA

Total 

7    

6

left arrow
Data for N winds

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Data for SE winds

Any observations hi-lighted in red were excluded from calculations for reasons given in column 5.