What sound does a secretary bird make?

Secretary birds are large birds of prey native to Africa. They are known for their long legs, which they use to chase down their prey, and their dark plumage, which helps them to blend in with their surroundings. Secretary birds are also known for their loud, piercing call, which is often described as a "screaming" or a "trumpeting" sound. This call is used to communicate with other secretary birds and to warn potential predators of their presence.