Distribution of the races of Dicrurus leucophaeus based on Charles Vaurie,
Vaurie, Charles. (1949). "A revision of the bird family Dicruridae". Bulletin of the AMNH 93 (4): 203–342. <a rel="nofollow" class="external free" href="http://hdl.handle.net/2246/1240">http://hdl.handle.net/2246/1240</a>.
L. Shyamal
CC BY 3.0
<span class="int-own-work" lang="en">Own work</span>