Kestrel vs Savannah Hawk

As we left the teak farm our driver spotted another of our targets, a Savannah Hawk.  I believe this is a fairly widespread species in South America, but was a new genus (Buteogallus) for all of us.  It acted like a Buteo but was much longer legged (and maybe smaller headed?) with much differently shaped wings and tail.

It was teed up atop a snag Redtail-like.  See anything over its right shoulder?  It didn't.

The hawk is tracking the kestrel with its eyes.

the kestrel peeled off pretty quickly though...

While the Savannah Hawk curled back to a more distant snag.