Yellow-bellied fantail 
(Rẻ quạt bụng vàng, Chelidorhynx hypoxanthus), also known as the yellow-bellied fairy-fantail

The yellow-bellied fantail (Chelidorhynx hypoxanthus), also known as the yellow-bellied fairy-fantail, is found in the Indian subcontinent, the Himalayas, and portions of Southeast Asia including Thailand, Vietnam, and Myanmar.

Stenostiridae: Stenostira Greek stenos narrow, thin; steira ship’s beak, forepart of keel.
Chelidorhynx Greek khelidon: swallow; rhunkhos: bill.
hypoxantha, Hypoxanthus: hypoxanthus Greek hupo beneath; xanthos yellow.