Planalto Hermit
Phaethornis pretrei
The planalto hermit is about 14 to 16.5 cm (5.5 to 6.5 in) long. Males weigh 4.5 to 7 g (0.16 to 0.25 oz) and females 3 to 5 g (0.11 to 0.18 oz). This medium-sized hermit has mostly olive green upperparts with reddish uppertail coverts. The next-to-inner tail feathers are longer than the others and all have white tips. Their underparts are cinnamon red. The face has a black "mask" with a white supercilium and gular stripe. The sexes are similar but the female has shorter wings and a less strongly decurved bill. Voice: The planalto hermit's song is variable, "often a sequence of evenly-spaced, alternating, single and double notes, e.g. 'ti-tsi...tsi...tsi...tsi...ti-tsi...tsi..tsi', but also sometimes triple-noted phrases such as 'chu-tsi-tsi...chu-tsi-tsi...chu-tsi-tsi...'."
ID text from Wikipedia, CC BY-SA 4.0
Reddish Hermit
Phaethornis ruber
The reddish hermit is 8 to 9 cm (3.1 to 3.5 in) long and weighs 1.8 to 3 g (0.06 to 0.11 oz). All subspecies are generally dark green and rufous on the upperparts and cinnamon rufous on the underparts. Males have a black band on the chest and the tail feather have narrow white or reddish tips. Females have lighter underparts than the males. P. r. episcopus is about the same size as the nominate but has orange-rufous rather than cinnamon-rufous underparts and white tips to the tail. P. r. nigricinctus is the smallest subspecies; it has the richest rufous underparts. P. r. Voice: The reddish hermit's song is "a high-pitched phrase repeated incessantly with clear pauses between phrases...evenly-spaced, slightly descending, single notes followed by a number of accelerating descending notes, e.g. 'tsee....tsee...tsee...tsee.tse.tsitsi'." It frequently sings for long periods at leks. It has "long whining calls" made while hovering and a "stip!" flight call.
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: Planalto Hermit and Reddish Hermit.