Table 2. Summary of individual behaviour analysis.

Playback	12 hours		24 hours		48 hours		72 hours		96 hours		Last day
N	17		17		16		16		16		13
	Z	p	Z	p	Z	p	Z	p	Z	p	Z	p
Number of calls	−0.98	0.33	−2.24	0.025	−3.22	0.001	−3.22	0.001	−2.56	0.010	−2.95	0.003
Latency to call	−0.89	0.37	−0.12	0.91	−2.28	0.023	−2.87	0.004	−2.10	0.036	−2.36	0.018
Latency to look	−0.68	0.50	−0.93	0.35	−1.38	0.17	−1.94	0.052	−2.83	0.005	−2.82	0.005
Latency to approach	−1.57	0.12	−1.61	0.11	−1.01	0.31	−1.79	0.074	−1.40	0.16	−0.94	0.35

The Wilcoxon matched pairs comparisons within each behavioural measure for each playback event. Significant differences in maternal responses between filial pup's and non-filial pup's FACs are highlighted in bold.