Mirror-Induced Behavior in the Magpie (Pica pica): Evidence of Self-Recognition (original) (raw)
Figure 4
Proportion of Self-Directed Behavior towards the Mark Area in Additional Tests
(A) Proportion of mark-directed behavior by Gerti in a test session with change of marks in consecutive 5-min intervals. The color of each bar refers to the color of the mark used and subsequent 5-min periods of the test. Activity towards the mark was high for all colored marks, but low in the control condition (black mark). In all of the color conditions, the bird removed the mark.
(B) Results from the first set of additional controls with a grid in front of the experimental cage instead of a Plexiglas wall. In the colored mark and mirror condition, mark-directed behavior was higher than in the colored mark and no-mirror condition (p < 0.02, Fisher exact test).