Fig. 2. Distribution of the observed (bars) and expected (horizontal line) probability of presence in 2 m rings of test males and females as a function of the distance to the cages. The observed probability is the proportion of the locations/2 m ring surface. The expected probability is calculated under the hypothesis of random distribution of sheep. Gray bars represent the distributions relative to the same-sex (B) and opposite-sex stimulus (C) and white bars to the empty cage. When confronted with two empty cages (A) or two same-sex stimuli (D) the grey and white bars refer, respectively, to the right and left cages. With two opposite-sex stimuli (E), grey bars represent the distribution relative to the stimulus of same sex as the test sheep, and white bars to the opposite sex.