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 1987 Monarch Butterfly Migration in Calhoun, Georgia

left arrowarrow leftTable II a
Preferred Mean Direction for Monarchs Flying Within 3 m of the Ground : Source of Observations used in Calculations (Next Page)

September 28 - October 10, 1987 observations of the Danaus plexippus migration in Calhoun, Georgia

Date 

Table

Sample
size   

Observations*
of = < 3 m  

Reasons for Exclusion 

Sept.  28

   I       

3 (4)    

4, 11, 13, 27

 circling     

29

 II       6 (7)    

36, 44, 49, 50, 52, 55, 56

 circling     
      30 III      -     

-

-         

Oct.    1 IV      1 (1)    

220

 -         
2 V       4 (8)    

233, 234, 236, 237, 238, 239, 242, 243

 social flight,
evasive flight
3 VI      -     

-

-         

4 VII     -     

-

-         

5 VIII   8 (8)    

275, 278, 283, 286, 291,  298, 301, 304

 -         
6 IX       1 (3)   

317, 318, 323,

 circling, turned
7 X       2 (3)    

332, 335, 343

 circling     
8 XI      -     

-

 -          
9 XII     6 (6)    

410, 413, 414, 416, 418, 420

-          
10 XIII    -      - -          

Totals 

-  

31 (40) 

To Results

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* Observations hi-lighted in red were excluded in second round of calculations for reasons given in column 5.