Gray-Headed Olive Back - Nesocharis capistrata

Description
Size: 5.5 inches
Adult: gray head, white face, black from chin to sides of neck; olive back and wings, bright yellow flanks.
Juvenille: dark gray head and face, dull buff-brown flanks.
Call: generally silent.
Song: a pleasant song, a soft descending 'chwee chweee chweee-chwi'