Pied Puffbird
Notharchus tectus
The pied puffbird is 14 to 17 cm (5.5 to 6.7 in) long and weighs 21 to 40 g (0.74 to 1.41 oz). The nominate subspecies is mostly glossy black above and white below. It has a white line from the bill through the eye, white speckles on the crown, a large white spot on the scapulars, and white near the base of the tail and at its end. A broad black band separates the breast from the belly and the flanks are barred black and white. N. t. picatus is larger and darker than the nominate, with less white on the tail feathers. N. t. Voice: The pied puffbird's song differs somewhat between the subspecies. Those of the nominate and N. t. picatus is described as a "thin but loud, high-pitched, bat-like series of whistles, 'tee-oo' or 'pweee pweee pweee' in various patterns". That of N. t. subtectus is "apparently higher-pitched and possibly more piping, less modulated".
ID text from Wikipedia, CC BY-SA 4.0
White-necked Puffbird
Notharchus hyperrhynchus
The white-necked puffbird is about 25 cm (9.8 in) long and weighs 81 to 106 g (2.9 to 3.7 oz).It is mostly glossy black. It has a broad white forehead, throat, upper breast, and most of the belly. A broad black band separates the last two, and a black stripe runs from the beak to the crown, passing through a dark red eye. The white of the throat extends as a fairly broad line around the nape. The lower flanks are barred black and white and the tail is black with narrow white tips to the feathers. The very large bill and the feet are black. Voice: Descriptions of the white-necked puffbird's song include "a long bubbling trill, at a constant pitch or rising slightly, then falling" and "an evenly pitched monotonous trill that lasts 3–5 seconds". It also makes "a descending whistle 'wheeew'" call and "a quiet growl."
ID text from Wikipedia, CC BY-SA 4.0

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Play today's Daily BirdPhotos and recordings are credited to their authors under the licence shown. Full profiles: Pied Puffbird and White-necked Puffbird.