Before revision: The advantages of this behavior are not certain, but evidence suggests that it confers some safety from predators, especially for the less watchful birds such as vireos (vireos) and woodpeckers, and also improves feeding efficiency, perhaps because arthropod prey that flee one bird may be caught by another.
After revision: The advantages of this behavior are not certain, but evidence suggests that it confers some safety from predators, especially for the less watchful birds such as vireos and woodpeckers, and also improves feeding efficiency, perhaps because arthropod prey that flee one bird may be caught by another.