Greyish Piculet
Picumnus granadensis
The greyish piculet is 9 to 10 cm (3.5 to 3.9 in) long and weighs 12 to 13 g (0.42 to 0.46 oz). Adult males of the nominate subspecies have a black crown and nape with small yellow tips on the feathers of the front and top and white spots on the rest. Their ear coverts are chestnut brown with a few white streaks, their cheeks off-white with blackish feather tips, and the sides of their neck gray-brown with white spots or streaks. Their hindneck and upperparts are grayish brown, often with an olive tinge. Their flight feathers are dark brown with yellowish green edges. Voice: The greyish piculet "alls infrequently, a high-pitched weak trill on one pitch."
ID text from Wikipedia, CC BY-SA 4.0
Scaled Piculet
Picumnus squamulatus
The scaled piculet is 8 to 9.2 cm (3.1 to 3.6 in) long and weighs 7 to 12 g (0.25 to 0.42 oz). Adult males of the nominate subspecies P. s. squamulatus have a black cap with red feather tips on the forehead and white ones on the rest of it. Their face is mostly brown with black tips on some feathers and a whitish line behind the eye. Their upperparts are olive brown with a scaly appearance due to narrow black borders on the feathers. Their flight feathers are brown with yellowish edges on the secondaries and tertials.
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: Greyish Piculet and Scaled Piculet.