Figure 3
From: Urban sparrows respond to a sexually selected trait with increased aggression in noise
Playback approach distance results. (a) Boxplot of playback distance (m) response to three song treatments (A) fast trill, wide bandwidth (4 ± 0.74 m), (B) fast trill, narrow bandwidth (7.6 ± 1.22 m), and (C) slow trill, wide bandwidth (6 ± 1.14 m). A is significantly different than B (p < 0.001), but A & C and B & C are statistically equal (p > 0.05). (b) Linear regression of male approach distance during playback and territory noise showing males approach more closely during playback when it is noisy (β = −0.05, p = 0.015).
