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Black-headed gulls, bar-tailed godwits and sanderlings foraging on a beach. A mixed-species feeding flock, also termed a mixed-species foraging flock, mixed hunting party or informally bird wave, is a flock of usually insectivorous birds of different species that join each other and move together while foraging. [1]
This species occurs in relatively stable groups. A dominance hierarchy occurs in Harris's hawks, wherein the mature female is the dominant bird, followed by the adult male and then the young of previous years. Groups typically include from two to seven birds. Not only do birds cooperate in hunting, but they also assist in the nesting process. [24]
Bird species living in a flock may capture prey, likely injured, from an unsuccessful bird within its flock. [2] This behavior is known as the beater effect and is one of the benefits of birds foraging in a flock with other birds. [2] It can be seen that birds in a flock may perform the information-sharing model. [2]
Many birds migrate in flocks. For larger birds, it is assumed that flying in flocks reduces energy costs. The V formation is often supposed to boost the efficiency and range of flying birds, particularly over long migratory routes. All the birds except the first fly in the upwash from one of the wingtip vortices of the bird ahead.
Measurements of bird flocking have been made [3] using high-speed cameras, and a computer analysis has been made to test the simple rules of flocking mentioned below. It is found that they generally hold true in the case of bird flocking, but the long range attraction rule (cohesion) applies to the nearest 5–10 neighbors of the flocking bird and is independent of the distance of these ...
As climate change fuels stronger storms, those can disrupt migration patterns, causing birds to stay in certain areas for longer, move later in the season, or risk mortality moving during a hurricane.
When the hunting finishes, the hunters give a portion of all that is caught to the hawks. [44] He also wrote that in the city of Cedripolis (Κεδρίπολις), men and hawks jointly hunt small birds. The men drive them away with sticks, while the hawks pursue closely, and the small birds in their flight fall into the clutches of the men.
A pack hunter or social predator is a predatory animal which hunts its prey by working together with other members of its species. [1] Normally animals hunting in this way are closely related, and with the exceptions of chimpanzees where only males normally hunt, all individuals in a family group contribute to hunting.