Sanderlings run in groups as they hunt for food in the sand on Long Beach Island, N.J. Vicki Jauron, Babylon and Beyond Photography/Moment via Getty Images The late Oxford University biologist William ...

While sitting on my back porch one day during late afternoon, my leisurely pursuit was interrupted as a large and seemingly nervous flock of red-winged blackbirds ...

Food is a factor, and birds will defend territory when it's scarce, but will not be so aggressive in an area with an inadequate supply. An error has occurred. Please ...

The birds rose simultaneously as I drew near, and then settled farther down the beach, clearly fearing me. The late Oxford University biologist William D. Hamilton discussed the advantages of flocking ...