Table 1.

Mean (±95% CI) intensity of behaviours measured during the STIs in relation to altitude, breeding stage and season.

	low altitude			high altitude
	territory establishment n = 31	parental phase n = 11	autumn n = 17	territory establishment n = 13	parental phase n = 25
approach (s)	186 ± 45	335 ± 77	241 ± 75	263 ± 104	262 ± 74
time within 5 m (s)	317 ± 54	251 ± 80	285 ± 78	212 ± 89	207 ± 65
fluffing (%)	70 ± 10	76 ± 14		81 ± 14	60 ± 13
head nods per minute	2.9 ± 0.6	3.2 ± 1.7		3.7 ± 1.1	2.7 ± 1