The Large Blue-flycatcher breeds in eastern Himalayan foothill forests and winters in lowlands of the Thai-Malay Peninsula. The sexes have different plumage.
Adult males are bright blue above, with orange extending from the throat to the belly. Females are grey-brown above, with a pale belly and a light orange wash.
It is classified as a full migrant, using eastern Himalayan foothill forest for breeding and more open lowland habitat on the Thai-Malay Peninsula in winter. It feeds mainly on invertebrates.
An extinction-risk assessment has not been added yet.