Black-crowned Palm-tanager

The black-crowned palm-tanager is 17 to 18 cm (6.7 to 7.1 in) long and weighs about 24 to 32 g (0.85 to 1.1 oz). The sexes are not particularly dimorphic. The species has a long, strong, sharply pointed bill with a black maxilla, and a blue-gray mandible with a black tip. The adults' head is mostly black with a white patch above the bill, a larger white patch above and beyond its red-brown eye, and a thin arc of white below its eye. Its nape is gray and the rest of the upperparts, including the tail, are bright yellowish olive. Voice: The black-crowned palm-tanager's song varies across its range. It is generally "jumbled squeaky notes that grow louder, then diminish and slow to short 'chit' notes". Some populations include raspy and buzzy phrases. Its calls include a "nasal, buzzy 'pe-u'... higher, more penetrating 'tseep'... also a low 'chep'."