Brown-chested Martin vs Southern Martin

Brown-chested Martin

Progne tapera

Small32 gGrassland

The brown-chested martin is 16 to 18 cm (6.3 to 7.1 in) long and weighs 30 to 40 g (1.1 to 1.4 oz). The sexes have the same plumage. Adults of the nominate subspecies have a mostly sandy brown head with a white chin and throat. Their upperparts are sandy brown. Their tail is slightly forked; it and their wings are a darker brown than the upperparts. Their underparts are mostly white with an indistinct brown band across the breast. Subspecies P. t. fusca is larger and overall darker than the nominate with a more defined breast band and dusky markings on the lower breast and belly. Voice: The brown-chested martin's song is "harsh and guttural with series of gurgling sounds". It has been described in more detail as "a series of liquid, rolling, descending trills, for example trr-tee-tuk-TEEERRR...trr-tee-tuk-TEEERRR...". Its calls are "a dry, buzzy djzeut and a more musical dureet".

ID text from Wikipedia, CC BY-SA 4.0

Photo: Frank Thomas Sautter · CC0

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: Brown-chested Martin and Southern Martin.