The Secretary bird is a large, mostly terrestrial bird of prey. Endemic to Africa, it is found in open grasslands. They are famous for their ability to kill snakes and they travel up to 30kms a day looking for snakes, insects and little animals.
Their name is thought to derive from the crest of feathers. These quill like feathers give the appearance of a secretary with quill pens tucked behind his/her ears.
What a beautiful bird to start with and your photo is remarkable in its clarity. I have always wondered how that name was attached to the bird. Thanks for the explanation.