Northern Nightingale-Wren vs Southern Nightingale-Wren

Northern Nightingale-Wren

Microcerculus philomela

Small18 gForest

The northern nightingale-wren is 10 to 11.5 cm (3.9 to 4.5 in) long; seven males weighed 17.4 to 21.5 g (0.61 to 0.76 oz) and four females 16.4 to 17.4 g (0.58 to 0.61 oz). Adults are almost entirely dark brown, but with a dark gray throat and breast. Black tips on feathers of both the upper- and undersides give a scalloped appearance. Juveniles are similar though the scaling on their upperparts is darker and that on the underparts is whitish to pale gray. Voice: The northern nightingale-wren's song is a "confident to hesitant, rising and falling series of whistles". It is sung during most of the year and often from low perches.

ID text from Wikipedia, CC BY-SA 4.0

Photo: er-birds · CC BY 4.0

Southern Nightingale-Wren

Microcerculus marginatus

Small18 gForest

The southern nightingale-wren is 11 cm (4.3 in) long; males weigh 18.2 to 22 g (0.64 to 0.78 oz) and females 17 to 18 g (0.60 to 0.63 oz). Adults of the nominate subspecies have a dull gray-brown face and deep chocolate-brown crown and upperparts with a reddish tinge on the rump. They have a very short dark chocolate tail. Their chin, chest, and upper belly are white with some black scalloping on the sides of the chest. The lower flanks and lower belly are dark chocolate. Voice: The songs of the southern nightingale-wren differ geographically. Those in Central America to western Amazonia are long complex series of short notes followed by several whistles. Those in Peru and Bolivia are " clear, pure notes given at random" with varying pitch, length, and volume.

ID text from Wikipedia, CC BY-SA 4.0

Recorded by Beth Cottam · Rancho Naturalista, Cartago Province, Costa Rica · CC0

Photo: José Loiza, Aves y Conservación · Public domain

Photos and recordings are credited to their authors under the licence shown. Full profiles: Northern Nightingale-Wren and Southern Nightingale-Wren.