Helmeted Pygmy Tyrant
Lophotriccus galeatus
The helmeted pygmy tyrant is about 10 cm (3.9 in) long and weighs 6 to 7 g (0.21 to 0.25 oz). The sexes have the same plumage. Adults have long black crown feathers with grayish olive edges. They form a crest that it sometimes erects and fans; they extend beyond the rear of the head when folded. Adults have whitish lores on an otherwise olive face. Their back, rump, and uppertail coverts are olive. Their wings are dusky with olive edges on the flight feathers and tips on the coverts; the latter show as two faint wing bars. Their tail is dusky with olive edges on the feathers. Voice: The helmeted pygmy tyrant's song is a "eries of 4–10 dry staccato 'pik' or 'trik' notes, sometimes ending in warbled or trilled phrase".
ID text from Wikipedia, CC BY-SA 4.0
Scale-crested Pygmy Tyrant
Lophotriccus pileatus
The scale-crested pygmy tyrant is 8 to 10 cm (3.1 to 3.9 in) long and weighs about 7 to 8 g (0.25 to 0.28 oz). It has long crown feathers that form the eponymous crest and that it sometimes erects and fans. Females have a smaller crest than males but the sexes otherwise have the same plumage. Adults of the nominate subspecies L. p. pileatus have a black crest with rufous edges on the feathers. They have whitish lores on an otherwise brownish face. Their back, rump, and uppertail coverts are olive. Voice: The scale-crested pygmy tyrant's main vocalization is a very loud trill that differs somewhat geographically. It has been written as "tr-tr-tr-tr-tr-tr-tr-tr" and "trrrrrreét", "dzzeeer-dzeer-dzeer", and "cre'e'e'e'e, k'e'e'e'e". It also makes "a series of sharp "preek" notes, sometimes widely spaced".
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: Helmeted Pygmy Tyrant and Scale-crested Pygmy Tyrant.