Blackish Tapaculo
Scytalopus latrans
The blackish tapaculo is approximately 11 cm (4.3 in) long. Males weigh 16 to 21 g (0.56 to 0.74 oz) and females 14 to 20 g (0.49 to 0.71 oz). The male of the "blackish" subspecies is dark to very dark gray and the female is dark gray, sometimes with an olive wash. The juvenile is not well known but is believed to be dull brown. The "Pacific" subspecies male is black while the female is gray, darker above and lighter below, with brown flanks. The juvenile is brown.
ID text from Wikipedia, CC BY-SA 4.0

Magellanic Tapaculo
Scytalopus magellanicus
It is a wren-like bird, 10 to 12 cm in length. The bill is slender and black while the legs are pinkish and fairly long. The tail is short and held erect. The plumage is dark-grey with a chestnut tinge to the flanks, undertail and wings. Some birds have a silvery-white patch on the crown. Juvenile birds are brown with dark barring and usually lack white on the crown. The song is loud, staccato and repetitive.
ID text from Wikipedia, CC BY-SA 4.0

Where you might meet both
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Play today's Daily BirdPhotos and recordings are credited to their authors under the licence shown. Full profiles: Blackish Tapaculo and Magellanic Tapaculo.