Northern White-fringed Antwren

The northern white-fringed antwren is 12 to 13 cm (4.7 to 5.1 in) long and weighs 8 to 14 grams (0.28 to 0.49 oz). Adult males of the nominate subspecies F. i. intermedia have a white supercilium that extends down the neck, along the side of the breast, and widens on the flanks. Their crown and upperparts are smoky brown. Their wings are black with a wide white bar and white dots on the coverts. Their tail is black with white feather tips. Their face, throat, and underparts are black. Adult females have upperparts like the male's. Voice: The northern white-fringed antwren has several vocalizations. The "monotone song" is a "single soft pup or chup note". It is repeated up to 25 times but is sometimes made only two to five times. The "trilled song" is a "mellow overslurred whistle followed by a fast flat-pitched soft trill: puuh-didididididi".