Grey-breasted Martin vs Southern Martin

Grey-breasted Martin

Progne chalybea

Small43 gShrubland

The grey-breasted martin is 16–18 cm (6.3–7.1 in) in length and weighs 33–50 g (1.2–1.8 oz). It has a forked tail and relatively broad wings. The adult male is glossy blue-black with the grey-brown throat, breast and sides contrasting with the white lower underparts. The female is duller than the male with a paler throat; the juveniles have dull brown upperparts.

ID text from Wikipedia, CC BY-SA 4.0

Recorded by Gean Carlo Valdés · Call, flight call · Islas secas, Panama · CC0

Photo: (c) Esteban Poveda, some rights reserved (CC BY), uploaded by Esteban Poveda · cc-by

Southern Martin

Progne elegans

Small51 gGrassland

The southern martin is 17 to 20 cm (6.7 to 7.9 in) long. The sexes are dimorphic though both have a deeply forked tail. Adult males are almost entirely glossy steel-blue with blacker wings and tail. Females have duller steel-blue upperparts than males. Their underparts are mostly dusky brown with paler feather edges that give a scaly appearance; their undertail coverts are white with dusky streaks. Juveniles resemble adult females. Voice: The southern martin's song is "a short gurgle"; it also makes "a harsh contact call and an alarm call".

ID text from Wikipedia, CC BY-SA 4.0

Photo: Ezequiel Vera · CC BY 4.0

Photos and recordings are credited to their authors under the licence shown. Full profiles: Grey-breasted Martin and Southern Martin.