(noun) A collective term for a group of migrating raptors. Though generally solitary, birds of prey will often follow the same route during migration to take advantage of the best thermals and other wind currents to aid flight. Thousands of raptors may be seen in the same flight pattern, creating the appearance of a coordinated flock as they wheel and soar. These flocks often include mixed species of raptors, including hawks, falcons and accipiters. While application of the term kettle will vary, it is generally reserved for groups larger than a dozen birds.
Photo – Kettle of Broad-Winged Hawks © bvg23
Flock, Cast, Cauldron