Yellow-billed Cuckoo (Coccyzus americanus) by Alan Murphy. Common folk-names for this bird in the southern United States are Rain Crow and Storm Crow. These likely refer to the bird's habit of calling on hot days, often presaging thunderstorms.
The Cocoi Heron (Ardea cocoi) is very similar to the Great Blue Heron of North America. They are common in the Pantanal and widespread through much of South America. We found this one perched on an open water stump, trying to catch a fish for the evening