The Gray-breasted Martin Progne chalybea, is a large swallow. Adult Gray-breasted Martins are 18 cm in length, with a forked tail and relatively broad wings. Adult males are a glossy blue-black with the grey-brown throat, breast and sides contrasting with the white lower underparts. Females are duller than the male, and juveniles have dull brown upperparts.
Gray-breasted Martins are gregarious birds which hunt for insects in flight.

These were photographed along the road to the Esquinas Rain Forest Lodge.

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