[Mystery bird] Black-faced Lourie, also known as the Bare-faced Go-away-bird, Corythaixoides personatus, photographed lying motionless in the afternoon sun in Tarangire National Park, Tanzania, Africa. [I will identify this bird for you in 48 hours]
Nikon D300, 200-400 VR lens at 240 mm, ISO 500, f/8 1/1250 sec.
As an added bonus, can you tell me what this bird is doing and why?
Please name at least one field mark that supports your identification.