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This thread discusses the possibility that seebohmi may be a separate species
Habitat
Rocky tundra, barren slopes, hill pastures, sand dunes.
Behaviour
Diet
Diet includes insects, some berries.
Breeding
Nest is on ground on dry tundra, usually in hole in a wall, under stones, or in old rabbit burrow. and is a cup of grass, twigs, weeds, lined with finer material such as moss, lichens, rootlets. The clutch is usually 5-6 pale blue eggs; unmarked, or with fine reddish brown dots, which are incubated by the female for 13-14 days.
Clements, JF. 2008. The Clements Checklist of Birds of the World. 6th ed., with updates to December 2008. Ithaca: Cornell Univ. Press. ISBN 978-0801445019.