A vulture is a scavenging bird of prey. A group of vultures is called a kettle, committee or wake. The term kettle refers to vultures in flight, while committee refers to vultures resting on the ground or in trees. Wake is reserved for a group of vultures that are feeding.
This images shows a 'wake' of vulltures feeding on a carcass, Kruger National Park, South Africa.
Information source: https://en.wikipedia.org/wiki/Vulture