Vanishing directions of 15 homing pigeons, released just over 16 kilometres Northwest of their loft.
fisherB12 a vector of 15 observations (in degrees).
fisherB12c contains the same observations in a circular objects.
Schmidt-Koenig (1963) On the role of the loft, the distance and site of release in pigeon homing (the "cross-loft experiment"). Biol. Bull. (125)154-164.
N.I. Fisher (1993) Statistical analysis of circular data. Cambridge University Press. Pag. 245.
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