[Mystery bird] Spotted Thick-Knee, also known as the Cape Thick-Knee or the Spotted Dikkop, Burhinus capensis, photographed in the Serengeti National Park, Tanzania, Africa. [I will identify this bird for you in 48 hours]
Nikon D300, 600 mm VR lens with 1.4 extender. ISO 400, 1/1600 sec, f/6.3. Exposure compensation -1.3.
Please name at least one field mark that supports your identification.