Straneck's Tyrannulet
Serpophaga griseicapilla
Straneck's tyrannulet is 9 to 11 cm (3.5 to 4.3 in) long and weighs 4.4 to 7.5 g (0.16 to 0.26 oz). The sexes have the same plumage. Adults have a gray crown and nape with a hidden bit of white on some black central crown feathers. They have a thin white supercilium, a white crescent under the eye, and a dark gray line through the eye on an otherwise grayish white face. Their upperparts are olivaceous brown. Their wings are dusky brownish gray with lighter edges to most of the flight feathers and two cinnamon to whitish wing bars. Voice: The main vocalization of Straneck's tyrannulet is "a high-pitched but not far-carrying 'twie tirrrrrrrrrrrrrrrrrr', occasionally with the first or second portions emitted alone". Its alarm call is "a more powerful, high-pitched 'tie...tie...tie...tie...' " of three to five notes.
ID text from Wikipedia, CC BY-SA 4.0
Torrent Tyrannulet
Serpophaga cinerea
The torrent tyrannulet is 9.5 to 12 cm (3.7 to 4.7 in) long; eight individuals weighed an average of 8.3 g (0.29 oz). Adults of the nominate subspecies have a mostly black head with a partially hidden white patch in the center of the crown. Their back, rump, and uppertail coverts are gray. Their wings are mostly black with gray or grayish white edges on the coverts. Their tail is black and sometimes has indistinct grayish white tips on the feathers. Their chin and throat are grayish white. The center of their breast and their belly are white and their undertail coverts slightly grayish. Voice: The torrent tyrannulet's dawn song in Costa Rica is a slow series of chip notes separated by as much as 10 seconds. Pairs also vocalize "in unison a short refrain made up of a sharp chip, rapidly repeated". Its song in the Andes has been described as "a high, thin seek!
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: Straneck's Tyrannulet and Torrent Tyrannulet.