Sulphur-bellied Tyrannulet
Mecocerculus minor
The sulphur-bellied tyrannulet is 11 to 12 cm (4.3 to 4.7 in) long and weighs about 11 g (0.39 oz). The sexes have the same plumage. Adults have a medium gray crown. They have a thin white supercilium and a blackish stripe through the eye on an otherwise grayish white face. Their upperparts are dark olive. Their wings are dark dusky with wide buff edges on the flight feathers. Their wing coverts have wide buffy tips that show as two bars on the closed wing. Their tail is dusky olive with buffy-tinged edges on the feathers. Voice: The sulphur-breasted tyrannulet's calls include "a sharp and fast 'chew-chew-chew' " that sometimes continues with more notes and "a squeakier, more nasal 'skwi-skwe-skwu-skwu' ".
ID text from Wikipedia, CC BY-SA 4.0
White-banded Tyrannulet
Mecocerculus stictopterus
The white-banded tyrannulet is 12.5 to 13 cm (4.9 to 5.1 in) long and weighs 8 to 11 g (0.28 to 0.39 oz). The sexes have the same plumage. Adults of the nominate subspecies have a medium gray crown. They have a white supercilium, a blackish stripe through the eye, and a faint dusky crescent behind the ear coverts on an otherwise whitish face. Their upperparts are dark brownish olive. Their wings are dark dusky with bright yellow to ochraceous edges on the flight feathers. Their wing coverts have wide pure white tips that show as two bars on the closed wing. Their tail is dusky olive. Voice: What is thought to be the white-banded tyrannulet's song is "a rising, wheezy rhzeee?, sometimes followed by a rich chew-bit or a scratchy, thin, rising-falling chatter".
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: Sulphur-bellied Tyrannulet and White-banded Tyrannulet.