I took this picture of a yellow billed oxpecker on the back of a giraffe in the Masai Mara. I still have not seen one in Lake Nakuru National Park. This one was perched on the giraffe and did not fly off when I approached.
Nikon D700, Sigma 150-500mm OS at 450mm, F6.3, 1/200s, ISO 200, handheld
Masai Mara National Reserve, Kenya