Table 2.

Probabilities of association between sociality (selecting the highest social state for polymorphic species) and tonal sound complexity. Significant positive associations at p-values > 0.972 and 0.973** for two and four state complexity characters, respectively and significant negative associations at p-values < 0.028 and 0.027* for two and four state complexity characters, respectively

TONAL SOUND COMPLEXITY [TWO & FOUR STATE CHARACTER]	SOCIAL STRUCTURE [FOUR STATE CHARACTER]
	0	1	2	3
0 (≤ 1 mean inflection point) D-statistic	0.0821	0.0536	-0.0424	-0.0047
p-value	0.798	0.728	p < 0.0001*	0.003*
1 (≤ 1 mean inflection point) D-statistic	-0.0440	0.00045	0.113	0.0360
p-value	p < 0.0001*	0.90	0.99**	0.99**
0 (0–1) D-statistic	0.084	-0.00029	-0.0338	0.009
p-value	0.93	0.055	0.002*	0.88
1 (1.1–2) D-statistic	-0.038	0.027	0.0781	0.022
p-value	0.002*	0.91	0.92	0.92
2 (2.1–3) D-statistic	-0.003	0.0121	0.0198	-0.0033
p-value	0.018*	0.89	0.91	0.014*
3 (>3.1) D-statistic	-0.0046	0.0151	0.0065	0.0023
p-value	0.012*	0.90	0.86	0.84

*Significant negative associations **Significant positive associations

D = 0.362 p < 0.0001, n_p-value = 1465, n_D = 2000 Social Structure and Tonal Sound Complexity (4-state)

D = 0.376 p < 0.0001 n_p-value = 343, n_D = 2000 Social Structure and Tonal Sound Complexity (2-state)