Table of Contents
Great Circle Hypotheis
Compass Bearings Hypothesis
Suns' Azimuth Hypothesis
Always Advance Hypothesis
Never Go Back Hypothesis
A Theoretical Kiepenheuer,
Schmidt-Koenig, and Gibo, Magnetoclinic, Magnetic Latitude, Spring Migration Route for
Eastern Population of Monarch Butterflies.
Center of Overwintering Sites used as Starting Point.
Drawing by Diane Scott
- Joined arrows indicate one possible K/S-K/G Magnetoclinic, Magnetic Latitude, spring
migration route from overwintering sites.
- Except for reversed polarity, individual arrows are the same as in the drawing of the
K/S-K/G Magnetoclinic, Magnetic Latitude, late
summer and fall migration route.
- All other lines, graphics, and numbers along margins are the same as in the drawing
of the Kiepenheuer and Schmidt-Koenig
Magnetoclinic late summer and fall migration route.
- Unless the preferred direction of monarch butterflies are rotated counterclockwise
early in the return migration by some unknown mechanism, the K/S-K/G route will lead them
to what would seem to be a very dangerous crossing of a large section of the Gulf. Two
meteorological phenomenon, the prevailing easterlies though the Gulf and the sea breeze
front, could redirect the migrants inland. However, both are unreliable on a day to day