Black-shouldered Kite Elanus axillaris
This bird sat for several hours on a television aerial, just sitting and watching.
Its brilliant white plumage fluttered all around its body, making it look twice as big as it really was.
I had watched several of these birds hunting along the road, hovering and then dropping quickly into the long grass. Perhaps they had had a successful morning and were now just watching, and digesting what the morning's meal.