Table 4.

The effect of sex and age of subordinate Seychelles warblers and territory quality, group size, the number of neighboring territories, and whether both parents were still present on the probability that subordinates Seychelles warblers were observed (A) prospecting (total n = 337) or (B) floating (n = 361)

	(A) Prospecting				(B) Floating
	β	SE	z	P	β	SE	z	P
Intercept	1.422	0.191	−7.445	<0.001	−4.548	1.030	−4.416	<0.001
Sex1	−0.936	0.339	−2.763	0.006	0.049	0.455	0.107	0.914
Age2	0.380	0.339	1.119	0.263	0.356	0.470	0.757	0.449
Territory quality (log10)3	0.792	0.456	1.735	0.083 3	−0.550	0.692	−0.795	0.427
Group size	−0.075	0.194	−0.389	0.697	0.681	0.236	2.890	0.004
Number of neighboring territories	−0.092	0.104	−0.881	0.378	0.018	0.144	0.127	0.899
Both parents present?4	0.269	0.372	0.723	0.470	−1.528	0.469	−3.261	0.001
Opposite‐sex breeder related?5	0.110	0.403	0.274	0.784	−0.265	0.533	−0.497	0.619
Helping6	−0.375	0.485	−0.772	0.440
Body condition 7	−0.064	0.467	−0.137	0.891

The effects of whether the opposite‐sex breeder was related⁵, whether subordinates helped⁶, and body condition (females only⁷) were tested in separate models.

¹Males relative to females.

²Subadult (5–12 months old) relative to adult (1–2 years old) subordinates.

³Territory quality data from 2005 were estimated based on average territory quality of 2004 and 2006 (see Methods section). The effect is slightly larger when estimated data from 2005 were excluded (n = 312, β = 0.842 ± 0.461, z = 1.829, P = 0.067).

⁴Subordinates living with related breeders, relative to birds in territories where the subordinate is unrelated to one or both breeders.

⁵Opposite‐sex breeder being first‐order relatives, relative to when the opposite‐sex breeder was unrelated.

⁶Birds that helped during the season in brood care relative to individuals that did not help. Note that these results were obtained in a subset model with 150 individuals for which we had information on helping behavior. Data on helping behavior were not available for floaters.

⁷Residual condition; body mass corrected for significant effects of tarsus length, and month and time of capture (see Table 4). Note that the results were obtained from a subset model with 78 individuals, only females, which were caught to assess body condition. Data on body condition in a resident territory were not available for floaters.