In times of the year when food supply is low, one can see titmice, nuthatches, kinglets, chickadees and woodpeckers foraging together. Being with a group gives them variety of eyes and ears to look for danger, and scout food.
Active chickadees are the ringleaders, quickest to spot danger, and aim for seeds and shelled peanuts. Titmice eat primarily insects like caterpillars, beetles, ants, and wasps. Woodpeckers go for tree barks, thereby seeking different nutrition from the same environment.
Birds, just like bees and human cells understand that together everyone achieves more.