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Fig. 3 | BMC Evolutionary Biology

Fig. 3

From: Evolution of contact and alarm calls in the Kenyan endemic Hinde’s babbler (Aves: Passeriformes)

Fig. 3

The coefficients of variation (CV) of the first principle component (Fig. 1) increased for contact calls (circles) and alarm calls (triangles) with increasing altitude (in m) of study sites (colours are as given in Table 3). Black exponential regression line (contact calls: permutation P = 0.01). Red exponential regression line (alarm calls: permutation P = 0.13)

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