Do a photo search for flocks to find an abundance of mesmerizing bird swarms, from bright-colored budgerigars to ever-changing formations of starlings.

Enjoy, and share, more photos of mass gatherings and migrations of birds in the Flock of Birds gallery and Flocks of Birds group.

Photos from Peter Knott, asjohnston3, Tamachi 999, ajm9339, h_plus0512, AlexP2010, and Don McCullough.