Table 2. Results of statistical tests to address the differences in head movement in zebra finch males and females in different conditions: in silence or during conspecific song playbacks.

Average Euclidian distance every 0.3 s was measured in the videos for the position of the beak. Bold-face numbers indicate significance levels p≤0.05.

Box's Test of Equality of Covariance Matrices	Box's M	F	df1	df2	p-value
	4.004	1.128	3	35280	0.336

Multivariate tests (Pillai’s Trace)	Value	F	p-value
head movement	0.348	7.468	0.016
head movement * sex	0.016	0.225	0.643
Tests of Between-Subjects Effects	df	F	p-value
sex	1	0.598	0.454