Greater Racket-Tailed Drongo
I saw this bird flying overhead on my walk this morning. It perched high in a tree, so I mostly saw a dark shape against the sky, of a medium-sized black bird with two long tail wires hanging down and black tear-shaped appendages at the end of the tail wires. 
February 8th, 2010 at 8:24 am
Update: I saw this bird doing an aerial display this morning; he swooped up over the treetops, did a barrel-roll that showed off his tail really well, then landed in a tree next to another drongo. I assume it was also a lesser racket-tailed one, but didn’t see its distinctive tail feathers. And all the while the acrobat bird kept up a rhythmic cry of “wake-a-wake wake.” Is this a mating display?