Montane Woodcreeper
Lepidocolaptes lacrymiger
The montane woodcreeper is 19 to 19.5 cm (7.5 to 7.7 in) long; males weigh 31 to 35 g (1.1 to 1.2 oz) and females 29.5 to 33 g (1.0 to 1.2 oz). It is a smallish to medium-sized woodcreeper with a slim, slightly decurved bill. The sexes have the same plumage. Adults of the nominate subspecies L. l. lacrymiger have a markedly streaked face and neck with a whitish supercilium that is often broken. Their crown and nape are dusky brown with conspicuous whitish buff spots with black tips; the spots become streaks on the nape. Voice: The montane woodcreeper is not highly vocal. Its song is "a 2·5 second series of 10–15 high-pitched whistles that accelerates and descends: 'tsip, tsip, tsip, ts-ts-tseeeéu, tseeu, tseu-tseu-tseu-tseu' or 'tseu, tseu, tsip-tsip, tsee-tsee-tsee-tsee-tsee' ". It also makes a "series of 3 reedy squeaks", a "double-noted cry", and a "rattle with introductory 'ah' ".
ID text from Wikipedia, CC BY-SA 4.0

Spot-crowned Woodcreeper
Lepidocolaptes affinis
The spot-crowned woodcreeper is 19 to 22 cm (7.5 to 8.7 in) long and weighs 28 to 38 g (0.99 to 1.3 oz). It is a slim, medium-sized woodcreeper with a slim, moderately decurved bill. The sexes have the same plumage. Adults of the nominate subspecies L. a. affinis have a dusky face and sides of the neck with a black malar stripe. Their crown and nape are dark brown with conspicuous buffy spots or diamonds that sometimes extend as thin streaks onto the upper back. Their back and wing coverts are plain brown, their rump rufous-cinnamon, and their wings and tail rufous-chestnut. Voice: The songs of the northern two subspecies of the spot-crowned woodcreeper differ from that of the southern subspecies. The "northern" song is a "high-pitched rising phrase of typically 3 notes (occasionally 2 or 4) tseeu-tsee-tsee". Those subspecies make "tseeuee" and shorter "tseeu" calls. The southern subspecies L. a.
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: Montane Woodcreeper and Spot-crowned Woodcreeper.