The mother Frigate bird is on the left and this is how she feeds her chick. She will bring up the food for her chick in her throat, but the chick has to reach in to get his meal.
The bird on the right is not a chick any longer, but these immature Frigate Birds feed this way for some length of time until they finally are on their own. They just sit there in low trees squawking until Mom flys in from the sea with there meal. The first pic shows what happens when Mom shows up. The other Frigates are hoping to nab lunch from the youngster, but Mom keeps the meal down in her stomach.
The Frigate adult can have a wing span of up to 8 feet. They also can hover in one place with a good breeze blowing. Like a helicopter. Perry.