Distribution and Habitat
The nominate subspecies D. n. nipalense breeds in the Himalayas from Garhwal east through Nepal, northeastern India and Bangladesh as far as western Burma. The race D. n. cuttingi is found in northern Burma, along Burma's border with Chinese Yunnan and in northern Tonkin, Vietnam. The Nepal House Martin is largely resident, but may move to lower altitudes when not breeding, and has been occasionally recorded in northern Thailand in winter. The range in Thailand is poorly known.
The habitat is river valleys and wooded ridges at 1000–4000 m (3,300–13,200 ft) altitude, although mainly below 3000 m (9,900 ft). When not breeding, birds may descend as low as 350 m (1,150 ft). The range of this species overlaps with that of the nominate subspecies of Asian House Martin, although they breed at different altitudes. The height separation and the small differences in appearance seem sufficient to prevent interbreeding.
Read more about this topic: Nepal House Martin
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