Look at that yawn.

It is a first for me to see the bird yawning, and I got him yawning a few times.

It is a juvenile Harrier Hawk (Polyboroides typus) and he was trying to get warm in the early winter sun. This was the reason for the lack of birdsong this morning, as when one of these appears, all of the birds flee. It is a magnificent bird, and there are only two species of this type. This one is in Africa, and the other one is in Madagascar. The only thing about the bird that we don't like is that he catches small birds and animals.

I will let Wikipedia tell you more about this bird's hunting techniques.

The African harrier-hawk is omnivorous, eating the fruit of the oil palm as well as hunting small vertebrates. Its ability to climb, using wings as well as feet, and its long double-jointed legs, enable this bird to raid the nests of cavity-nesters such as barbets and woodhoopoes for eggs and nestlings. It has been known to prey on introduced species such as feral pigeons, house sparrows and eastern gray squirrels.

They forgot to mention that he even catches small dogs.

The African harrier-hawk is omnivorous, eating the fruit of the oil palm as well as hunting small vertebrates. Its ability to climb, using wings as well as feet, and its long double-jointed legs, enable this bird to raid the nests of cavity-nesters such as barbets and woodhoopoes for eggs and nestlings. It has been known to prey on introduced species such as feral pigeons, house sparrows and eastern gray squirrels.

You can even see him in the source link, hanging from a weaver colony nest.