Figure 4
From: Behavioural response of a migratory songbird to geographic variation in song and morphology
Decoy experiment in males. Behavioural response for (a) latency to approach, (b) time spent within 5 m, and (c) number of tail flips to (1) local, (2) European, (3) African, and (4) control stimuli (European robin). Males discriminated between local and foreign stimuli by responding more strongly to decoys of their own population. Detailed description of boxplots as in Figure 2; n =16.