Sandhill cranes (Antigone canadensis) at Whitewater Draw, near McNeal, Arizona. 

The Arizona Game and Fish Department estimates that the 2020 crane population in the Sulfur Springs Valley is about 27,000 birds, with more that half concentrated at the draw. The flock assembles there each night at dusk after a day of gleaning food from nearby farm fields. Then the birds disperse again at first light, flying away from the draw in long skeins. This photo shows only a few hundred of the cranes coming in for the night. 

For a discussion of the birds’ binomial see this old post. Please click the photo for an enlarged view.