Table 4. Results for McDonald-Kreitman neutrality test.

		Non-synonymous mutations		Synonymous mutations	McDonald-Kreitmann test
Lowland brown	Fixed		6	3	NS
	Polymorphic		1	1
Highland brown	Fixed		6	2	NS
	Polymorphic		1	3
Brown (both lowland and highland)	Fixed		6	2	NS
	Polymorphic		1	3
Grey	Fixed		6	2	NS
	Polymorphic		1	3
Grey-headed brown	Fixed		6	2	NS
	Polymorphic		1	2
Grey-headed brown-naped brown	Fixed		6	2	NS
	Polymorphic		2	3
Zosterops borbonicus	Fixed		6	2	NS
	Polymorphic		3	4
Zosterops mauritianus	Fixed		6	2	NS
	Polymorphic		1	3

Zosterops japonicus sequence was used as an outgroup. NS: non-significant.