The African Blue-flycatcher

 (read in Planet Earth David Attenborough voice) Here we have Elminia longicauda, more commonly known as The African Blue-flycatcher.  This perky little fellow was peacefully minding his own business chirping happily, but then suddenly noticed my presence and flew off into the canopy.  According to my Birds of East Africa book (by Stevenson and Fanshawe), its voice can be described as "long and complex warble of sweet and harsh, and sometimes very metallic chits and tinks and canary-like flourishes.  A metallic chink is also used as a contact and alarm call."  (observed in Kakamega Rain Forest, February 2012)