The Pacific Swallow has a metallic blue back and chestnut on the forehead and throat. In Singapore, it is recorded year-round from mangroves to urban areas.
The upperparts are metallic blue. The forehead, throat, and upper breast are chestnut, and the tail has white marks.
NParks records it as resident in Singapore. It occurs in many habitat types there, including mangroves, parks, gardens, and urban areas.
An extinction-risk assessment has not been added yet.