Narrow-billed Woodcreeper
Lepidocolaptes angustirostris
The narrow-billed woodcreeper is 18 to 22 cm (7.1 to 8.7 in) long; males weigh 23 to 37.5 g (0.81 to 1.3 oz) and females 21.5 to 33.5 g (0.76 to 1.2 oz). It is a slim, medium-sized woodcreeper with a long, slim, moderately decurved bill. The sexes have the same plumage. Adults of the nominate subspecies L. a. angustirostris have pale lores, a buffy white supercilium that widens to the rear and becomes a line of broken spots, and a black stripe behind the eye. Their crown and nape are blackish brown with whitish buff streaks. Voice: The narrow-billed woodcreeper's song is "a loud series 3–5 seconds long of 4–8 sharp descending notes that may be either clear whistles 'peer, peer, peer, peeer, peeeer, pweeeer', rolling and somewhat slurred repetitions of 'drewEEew', or clear notes that gradually accelerate, fade and descend, 'peeé, pee-pee-pee-pee-peepeepeepeepupupu'.
ID text from Wikipedia, CC BY-SA 4.0
Streak-headed Woodcreeper
Lepidocolaptes souleyetii
The streak-headed woodcreeper is 19 to 21 cm (7.5 to 8.3 in) long and weighs 23 to 31 g (0.81 to 1.1 oz). It is a slim, medium-sized woodcreeper with a longish, slender, decurved bill. The sexes have the same plumage. Adults of the nominate subspecies L. s. souleyetii have a face with thin whitish buff and dark brown streaks; the sides of the neck are more heavily streaked. They have a whitish buff supercilium and eyering. Their crown and nape are dark brown with bold whitish buff streaks that often extend onto the upper back. Their back and wing coverts are rufous-olive to cinnamon-brown. Voice: The streak-headed woodcreeper's song has been described as "a simple, descending, clear trill, soft and melodious", "a clear musical descending trill that lasts 1.5-3 seconds", "a high-pitched, thin, flat trill, p'e'e'e'e'e'e'e'eeeaaa, rapid and descending throughout, ca 2-2.5 sec.", and as "a loud, ringing, rapid, descending series of puttering notes: pee'i'i'i'i'i'i'i'i'i'i'i'i'i'i'i'i'ew".
ID text from Wikipedia, CC BY-SA 4.0
Where you might meet both
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