The Ostrich Riders

I started this over the weekend and finished it today. It's the first of several drawings I intend to do based around the theme of Lovecraftian horrors from every corner of the earth, integrated into our world. More to come soon enough.
These guys rules the African savannah. Whether they're creatures descended from human stock, or ascending towards it is uncertain. All that is known is that these ghastly mounted riders hunt and viciously slaughter all human life that ventures into their territory.
I should mention I did use a reference from www.itsnature.org, though I took some liberties with the lighthing and exact pose.