The Blue-and-white Swallow is very similar to the Mangrove Swallow, given that the Mangrove’s upperparts are green but may look blueish under certain lighting conditions, and they share the white underparts and long black wings and tail. It is distinguished by having black undertail coverts, and the fact that Mangrove Swallows are for the most part encountered in coastal areas, while the Blue-and-White can be found almost anywhere in the country. Like other swallows, they readily perch in cables to rest. They also like to construct their nests in human made structures like roofs.
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