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. 2014 Apr 30;9(4):e95746. doi: 10.1371/journal.pone.0095746

Figure 4. Comparison of the structure of the songs of experimental versus wild individuals.

Figure 4

Songs by male (closed symbols) and female (open symbols) wild (circles) and captive-reared (red triangles) H. naevioides grouped together while those produced by H. naevius (closed diamonds) grouped separately. Plot produced according to three principal components generated from acoustic data extracted from spectrograms; PC3 is represented by depth and is not labelled (see Table S1 for factor loadings).