Table 1. Parameter estimates for the top linear model examining variation in δ ²H_f.

Parameter	Estimate	SE	t	p
Intercept	−17.57	1.65	−10.63	0.00
δ 2Hp	0.95	0.02	44.10	0.00
Resident dummya	−10.33	3.15	−3.27	0.00
Short-distance Migrant dummyb	−5.41	2.18	−2.48	0.01
Foraging Substrate dummyc	−9.52	1.32	−7.20	0.00
Resident*Foraging substrate interaction	26.21	4.31	6.08	0.00
Short-distance Migrant*Foraging substrate interaction	−4.40	2.85	−1.55	0.12

^a1 = Resident, 0 = Neotropical or Short-distance Migrant.

^b1 = Short-distance Migrant, 0 = Neotropical Migrant or Resident.

^c1 = Species foraging in Canopy, shrubs or aerially, 0 = Ground foraging species.