by Steve Purnell
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A particular characteristic of many vultures is a bald head, devoid of normal feathers. This helps to keep the head clean when feeding. Research has shown that the bare skin may play an important role in thermoregulation.
A group of vultures is called a wake, committee, venue, kettle, or volt. The term kettle refers to vultures in flight, while committee, volt, and venue refer to vultures resting in trees. Wake is reserved for a group of vultures that are feeding. The word Geier (taken from the German language) does not have a precise meaning in ornithology; it is occasionally used to refer to a vulture in English, as in some poetry.
(Courtesy of Wikipedia)