Based on the Secretary Bird, a fierce raptor endemic to Africa.
Some say that the feathers on its head look like quills tucked behind a secretary's ear, hence, its name.
You really never know when inspiration strikes.
I knew of this bird for years, but it took a flash across the TV screen on Animal Planet to spark something.
Note: I need a bigger scanner... or a better camera. The colours are a bit off and some of the details are lost despite my attempts to adjust the colours to look more like the original thing.