Invariants in Configurational Prey Selection by Bufo bufo (L.)

Authors:
  • JEJ.-P. Ewert
    J.-P. Ewert
  • BAB. Arend
    B. Arend
  • VBV. Becker
    V. Becker
  • HBH.-W. Borchers
    H.-W. Borchers
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Abstract
Toads (Bufo bufo) are able to distinguish small stripes with axis orientation in the direction of motion (worm-like stripes) from those with axis orientation perpendicular to the direction of motion (anti-worm-like stripes). The configurational discrimination ability of the toad is, thus far investigated, largely invariant for (1) movement direction in the x-y plane, (2) direction of contrast – stripe against background – and (3) velocity of stripe motion.