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-throated Tyrannulet
Mecocerculus leucophrys
The white-throated tyrannulet is 11 to 14 cm (4.3 to 5.5 in) long. The sexes have the same plumage. Adults of the nominate subspecies M. l. leucophrys have a dark olive-gray crown and nape. They have white lores and a thin white supercilium on an otherwise dusky face with some white on the ear coverts. Their upperparts are medium olive-gray. Their wings are brownish black with cinnamon-buff to yellowish buff edges and tips on the flight feathers. Their wing coverts have cinnamon-buff tips that show as two wide bars on the closed wing. Their tail is dusky brown. Voice: The white-throated tyrannulet's dawn song is "an excited-sounding 'ch'd'dik, ch'd'dik, ch'd'dik, chéw' " with some variations in emphasis and sometimes some "kee-keek" notes inserted. While foraging it often gives a "pit" or "pif" note.
ID text from Wikipedia, CC BY-SA 4.0
Where you might meet both
Learn this pair in the BeakBrain App
Photo and call practice. Coming soon to iPhone and Android.
Play today's Daily BirdPhotos and recordings are credited to their authors under the licence shown. Full profiles: Sulphur-bellied Tyrannulet and White-throated Tyrannulet.