Grey Silky-flycatcher
Ptiliogonys cinereus
The grey silky-flycatcher is 18.5 to 21 cm (7.3 to 8.3 in) long. It is a slender bird with a prominent crest and a long tail. Adult males of the nominate subspecies P. c. cinereus have dusky lores, a white patch above the lores, a thin white eye-ring, and a white or brownish white chin and cheeks on an otherwise blue-gray head and crest. Their upperparts are blue-gray. Their flight feathers are black. Their central pair of tail feathers are black and the rest have a black base, a white upper half, and black lower half. Voice: The grey silky-flycatcher's song is "a warbled series of chuck notes, high seep notes and quiet whistles". It also makes a loud "tu whip, tu whip" whose second note is higher-pitched and more emphatic, a "dry chi-che-rup che-chep", a "nasal k-lik", and a "rattling note in flight".
ID text from Wikipedia, CC BY-SA 4.0
Long-tailed Silky-flycatcher
Ptiliogonys caudatus
The long-tailed silky-flycatcher is 20 to 24.4 cm (7.9 to 9.6 in) long and weighs about 37 g (1.3 oz). It is a slender bird with a prominent crest and a long tail whose central pair of feathers extend beyond the others. Adult males have a gray forehead and crown and a thin yellow eye-ring. The rest of their face, their crest, and their neck are yellowish olive-green. Their back, rump, uppertail coverts and upperwing coverts are bluish gray. Their flight feathers and tail are black with most tail feathers having a large white patch in their middle. Voice: The long-tailed silky-flycatcher makes a "wooden and staccato (but sweet) chittering". Its vocalizations have also been described as "a sharp, dry che chip, che chip, likened to sound of loose pebbles in a box when uttered by a flock", "a rattling che-e-e-e-e or bell-like tinkling note" in flight, and "low lisping notes punctuated by louder che chip notes".
ID text from Wikipedia, CC BY-SA 4.0

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