Ivory-billed Woodcreeper
Xiphorhynchus flavigaster
The ivory-billed woodcreeper is 20 to 26.5 cm (7.9 to 10 in) long. Males weigh 40 to 62 g (1.4 to 2.2 oz) and females 35 to 56 g (1.2 to 2.0 oz). It is a medium-sized member of genus Xiphorhynchus, with a long, fairly heavy, slightly decurved bill. The sexes have the same plumage. Adults of the nominate subspecies X. f. flavigaster have a face with fine buffy and blackish streaks, an indistinct buffy supercilium and eyering, and a faint dark stripe behind the eye. Their crown and nape are dark grayish brown with longish buff spots that are almost streaks. Voice: The ivory-billed woodcreeper's song in western Mexico is "piercing whistles in loud cascade that first ascends slightly and increases in volume before descending and slowing, 't-t-t-ttttttttt-t-tewtewtew-tew-tew' ". In northern Central America it is "a rapid trill, descending slightly in pitch at end" and in Costa Rica "a loud, laughing, descending whinny.
ID text from Wikipedia, CC BY-SA 4.0
Wedge-billed Woodcreeper
Glyphorynchus spirurus
The wedge-billed woodcreeper is the smallest woodcreeper, with a short, upturned, wedge-shaped bill resembling those of the three members of genus Xenops. It is 13 to 16 cm (5.1 to 6.3 in) long and weighs 10.5 to 21 g (0.37 to 0.74 oz). The sexes are alike. The nominate subspecies G. s. spirurus has a grayish forehead, a rich brown to russet-brown crown and nape, light buff lores, a thin buff to buff-white supercilium, a buff eyering, sooty-brown auriculars, and a brown malar stripe. Voice: The wedge-billed woodcreeper sings mostly at dusk and dawn, though occasionally during the day as well. The subspecies in the pectoralis group of Central America into Colombia sing "a rapidly ascending, accelerating and somewhat slurred series of c. 25 bubbly notes...'twee-lee-lee-le-le-ee-ee-eeeeeé' ". It is also described as "weet-weet-WEEET-WEEET-weet-peet-peeet't't't't't't'teu".
ID text from Wikipedia, CC BY-SA 4.0
Where you might meet both
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