Table 2. Assemblage-level test of an association with habitat type for the ratio regular-irregular.

For each biological combination, we present the total number of eco-regions that have avian species with plumage patterns, and the number, proportion and habitat type of eco-regions that have an observed ratio regular-irregular significantly different from the null expectation.

Biological combination				Significant eco-regions
Sex	Body part	Season	Number of eco-regions	Number	Proportion	Name
Female	Ventral	NB	766	2	0.003	Antipodes Subantarctic Islands Tundra (Tundra–Australasia), Pantanal (FGS–Neotropics)
		BR	759	0	0	–
	Dorsal	NB	769	0	0	–
		BR	759	1	0.001	New Caledonia Rain Forests (TMBF–Australasia)
Male	Ventral	NB	773	0	0	–
		BR	767	2	0.003	Victoria Basin Forest-Savanna Mosaic (TMBF–Afrotropics), Kinabalu Montane Alpine Meadows (MGS–Indo-Malay)
	Dorsal	NB	773	2	0.003	Banda Sea Islands Moist Deciduous Forests (TMBF–Australasia), New Britain-New Ireland Montane Rain Forests (TMBF–Australasia)
		BR	767	6	0.008	Admiralty Islands Lowland Rain Forests (TMBF–Australasia), Banda Sea Islands Moist Deciduous Forests (TMBF–Australasia), New Caledonia Dry Forests (TDBF–Australasia), Kinabalu Montane Alpine Meadows (MGS–Indo-Malay), Fiji Tropical Moist Forests (TMBF–Oceania), Bohai Sea Saline Meadow (FGS–Palearctic)
Juvenile	Ventral		763	1	0.001	Antipodes Subantarctic Islands Tundra (Tundra–Australasia)
	Dorsal		761	2	0.001	Zambezian Halophytics (FGS–Afrotropics), Kinabalu Montane Alpine Meadows (MGS–Indo-Malay)

Notes.

Habitat type

TMBF

Tropical and Subtropical Moist Broadleaf Forests

TDBF

Tropical and Subtropical Dry Broadleaf Forests

MGS

Montane Grasslands and Shrublands

MFWS

Mediterranean Forests, Woodlands and Scrub

FGS

Flooded Grasslands and Savannas

DXS

Deserts and Xeric Shrublands

Season

NB

Non-breeding

BR

Breeding