This is a Copperytailed Coucal which is fatter and larger than the Senegal Coucal. It, too has a reputation for being a nest robber. Its diet is usually insects, small rodents, and birds' eggs. [Botswana].
A different view of the same Copperytailed Coucal as in the preceding 2 images. Its feathers are being ruffled by the sudden brisk breeze. Please refer to the caption of the first image. [Botswana '09].