Table 1.

Summary of results of empirical networks

Data set	n	No. of groups	c	Q (CI)	P	rcom
Tits	151	347	3	0.54 (0.52–0.59)	<0.001	0.99
Sparrows	27	430	3	0.43 (0.37–0.50)	<0.001	0.81
Thornbills	63	109	3	0.22 (0.20–0.34)	0.001	0.46

Here, c is the reported number of communities from the detection algorithm, Q is the modularity index with 95% confidence intervals (CI) estimated using a bootstrap test, P is the significance estimated from a standard data permutation test (evaluating whether Q is larger than expected based on shuffling the observed data) and r_com is the assortativity index using the method described in this paper. Details of each method are given in the main text.