Table 1.

Beak dimensions of species compared with admixed individuals (FS or SF)

			Length			Depth
Year	Group	n	Mean	SE	P	Mean	SE	P
2002	G. fortis	69	10.85	0.094	0.0078	9.10	0.099	0.2505*
	FS	7	11.75	0.371		9.70	0.469
	G. scandens	67	13.48	0.099	0.0995*	9.06	0.075	0.6363
	SF	7	12.31	0.597		8.94	0.196
2005	G. fortis	93	10.31	0.080	<0.0001	8.62	0.062	0.1379*
	FS	10	12.11	0.257		9.88	0.343
	G. scandens	29	13.17	0.124	0.1181*	9.05	0.124	0.5354
	SF	10	12.65	0.286		9.20	0.182
2008	G. fortis	79	10.23	0.082	0.1186*	8.47	0.074	0.1514*
	FS	5	11.34	0.563		9.22	0.422
	G. scandens	97	13.41	0.077	0.0110	8.99	0.058	0.2540
	SF	19	12.65	0.261		9.16	0.172
2009	G. fortis	51	10.28	0.109	0.1406*	8.37	0.106	0.3342
	FS	5	11.50	0.666		8.72	0.320
	G. scandens	40	13.46	0.142	0.2250*	9.10	0.103	0.4676
	SF	5	12.42	0.726		9.32	0.213
2010	G. fortis	74	10.40	0.086	0.0262*	8.46	0.072	0.2171
	FS	10	11.36	0.359		8.73	0.268
	G. scandens	59	13.28	0.125	<0.0001	8.92	0.085	0.3132
	SF	15	11.91	0.317		8.73	0.177

P values are associated with one-tailed t tests that assume unequal variances or, when variances were equal, by F tests as indicated by an asterisk (*). Significance is indicated by boldface for emphasis. Original measurements were in millimeters.