Table 2. Individual frequency of contest hoots in the challenge and play contexts for each signaller of group 1 and 2.

Study group	Signallers	Age class	Social status	N contest hoots
				Challenge (N = 460)	Play (N = 125)
1	Manono	A	α	73	0
1	Kikwit	A	I	13	0
1	Fizi	SA	α	38	0
1	Lomami	SA	I	103	35
1	Api	SA	I	82	54
1	Matadi	SA	I	9	4
1	Dilolo	SA	I	37	10
2	Keza	A	H	79	6
2	Mbandaka	SA	α	10	14
2	Ilebo	SA	I	16	2

Age classes; A: adult, SA: subadult. Social status; α: alpha male; H: high-ranking; I: intermediate-ranking; L: low-ranking.