Another name for this bird is the Savannah Vulture. This is a Lesser Yellow Head which lives primarily in Mexico and south through Central and South America. They can be found in Texas near the border.
These are large birds with a 6 foot wing span and about 3 1/2 feet tall. The only sound they make is a series of grunts or hissing.
These were taken with a 300mm lens and fairly close. Nothing like a big, bald, black bird hissing in your face.
I didn’t catch this in a photo, however, at the right angle you can see right through their nose. The large openings are why they have such a keen sense of smell. Looks very weird too.
This bird was photographed at the Center For Birds Of Prey, South Carolina. Unlike many of their other birds this one was not allowed flight in the fields. Over head there are always local vultures flying so it might be too tempting to just take off and never come back.