Charadrius vociferus
left Killdeer Photograph right
2007 Photograph, Killdeer, a Plover (Charadrius vociferus, Sandpiper Family, Scolopacidae), Huntley Meadows, Alexandria, Virginia, © 2020.
These plovers live up to their specific name--vociferus.  These three were having a very serious conversation about something or other; the one in the middle has turned away for a moment.
You are hearing a Killdeer calling while in flight.
Jian Zhe Li

Nature Photography, Wildlife Photography, Waterfowl Photography and Bird Photography from Marsh, River, Field and Forest Habitats.
All images Copyright © 1999 - by Gerry Gantt, all rights reserved.