The Ashy-throated warbler (Phylloscopus maculipennis) is a species of leaf warbler (family Phylloscopidae). It was formerly included in the "Old World warbler" assemblage.
It is found in Bhutan, China, India, Laos, Myanmar, Nepal, Pakistan, Thailand, and Vietnam. Its natural habitats are temperate forests and subtropical or tropical moist lowland forests.
Range map from www.oiseaux.net - Ornithological Portal Oiseaux.net
www.oiseaux.netis one of those MUST visit pages if you're in to bird watching. You can find just about everything there