Slate colored fox sparrow
Passerella schistacea
Sooty fox sparrow
Passerella iliaca unalaschcensis
Passerella iliaca megarhyncha
Thick-billed fox sparrow
Passerella iliaca zaboria
Passerella iliaca iliaca
Passerella iliaca stephensi
Thick-billed fox sparrow
Passerella iliaca monoensis
Mono thick-billed fox sparrow