Sao Tome Paradise-Flycatcher Terpsiphone atrochalybeia

A distinctive long-tailed paradise-flycatcher with different-looking sexes. Male is glossy blue-black with a pale blue bill and blue eye-rings; female has a dark crown, a gray face, rusty upperparts, and pale underparts. Juvenile is like female; young male slowly turns black. A common resident throughout São Tomé in the understory and at middle levels of most habitats. The only other flycatcher within its range is the dull brown Spotted Flycatcher, a scarce migrant. Calls include a rapid electric clicking and buzzing “dzzrt-dzzrt-dzzrt.” The song is a musical repeated “swee dzee-tee che-ree.”