Jack Dykinga / Yellow-headed blackbirds (Xanthocephalus xanthocephalus) and Redwing blackbirds (Agelaius phoeniceus) roosting. Whitewater Draw Wildlife Area, Arizona, USA, December.

Jack Dykinga / Murmuration of Yellow-headed blackbirds (Xanthocephalus xanthocephalus) and Redwing blackbirds (Agelaius phoeniceus) at sunset, before roosting. Whitewater Draw Wildlife Area, Arizona, USA, December.

Marie Read / Red-winged Blackbird (Agelaius phoeniceus) male displaying in cattail marsh, Viera Wetlands, Brevard County, Florida, USA, January.

Alan Murphy/ BIA / Red-winged Blackbird (Agelaius phoeniceus) male, Texas

Gerrit Vyn / Red-winged blackbirds (Agelaius phoeniceus) in flight. Lower Klamath National Wildlife Refuge, Siskiyou County, California, USA. December.

Alan Murphy / Red-winged Blackbird (Agelaius phoeniceus) males fighting, Texas

Steve Gettle / Red-winged Blackbird (Agelaius phoeniceus) male calling, Kensington Metropark, Michigan

Shattil & Rozinski / Large flock of Red winged blackbirds (Agelaius phoeniceus) flying across road, Lower Rio Grande Valley, Texas, USA

Rolf Nussbaumer / Red winged blackbird, male singing on yucca plant {Agelaius phoeniceus} Texas, USA

Jack Dykinga / Murmuration of Yellow-headed blackbirds (Xanthocephalus xanthocephalus) and Redwing blackbirds (Agelaius phoeniceus) before roosting. Whitewater Draw Wildlife Area, Arizona, USA, December.

Marie Read / Red-winged blackbird (Agelaius phoeniceus) male calling and displaying, backlit, showing steamy breath on a chilly spring morning, Ithaca, New York, USA, April.

Marie Read / Red-winged Blackbird (Agelaius phoeniceus) male displaying in cattail marsh, backlighting, Ithaca, New York, USA, April.

Marie Read / Mixed Blackbird flock, mostly Red-winged Blackbirds (Agelaius phoeniceus), in flight against backdrop of autumn foliage in November, Bosque Del Apache National Wildlife Refuge, New Mexico, USA. Novemb...

Alan Murphy/ BIA / Red-winged Blackbird (Agelaius phoeniceus) male calling in territorial display, British Columbia, Canada

Enrique Patino/ BIA / Red-winged Blackbird (Agelaius phoeniceus) male, Washington

Nick Saunders/ BIA / Red-winged Blackbird (Agelaius phoeniceus) male in territorial display, Saskatchewan, Canada

Tim Zurowski/ BIA / Red-winged Blackbird (Agelaius phoeniceus) male calling, British Columbia, Canada

Phil Savoie / Red winged blackbird (Agelaius phoeniceus) male in flight, Montana, USA, June.

Phil Savoie / Red-winged blackbird (Agelaius phoeniceus) female collecting mayfly prey to feed chicks, Madison River, Bozeman, Montana, USA. May.

Phil Savoie / Red winged blackbird (Agelaius phoeniceus) singing, Bozeman, Montana, USA, April.

Phil Savoie / Red Winged blackbird (Agelaius phoeniceus) male in flight Montana, USA, June.

Phil Savoie / Red-winged blackbird (Agelaius phoeniceus) female collecting mayfly prey to feed chicks, Madison River, Bozeman, Montana, USA. May.

Phil Savoie / Red-winged blackbird (Agelaius phoeniceus) female collecting mayfly prey to feed chicks, Madison River, Bozeman, Montana, USA. May.

Phil Savoie / Red-winged blackbird (Agelaius phoeniceus) female collecting mayfly prey to feed chicks, Madison River, Bozeman, Montana, USA. May.

Phil Savoie / Red winged blackbird (Agelaius phoeniceus), collecting mayfly prey for chicks, Bozeman, Montana, USA. April.

Phil Savoie / Red-winged blackbird (Agelaius phoeniceus) with insect prey, Bozeman, Montana, USA, June.

Phil Savoie / Red winged blackbird (Agelaius phoeniceus), collecting mayfly prey for chicks, Bozeman, Montana, USA. April.

Phil Savoie / Red-winged blackbird (Agelaius phoeniceus) female collecting mayfly prey to feed chicks, Madison River, Bozeman, Montana, USA. May.

Phil Savoie / Red-winged blackbird (Agelaius phoeniceus) female collecting mayfly prey to feed chicks, Madison River, Bozeman, Montana, USA. May.

Phil Savoie / Red-winged blackbird (Agelaius phoeniceus) female collecting mayfly prey to feed chicks, Madison River, Bozeman, Montana, USA. May.

Phil Savoie / Red winged blackbird (Agelaius phoeniceus), collecting mayfly prey for chicks, Bozeman, Montana, USA. April.

Phil Savoie / Red winged blackbird (Agelaius phoeniceus), collecting mayfly prey for chicks, Bozeman, Montana, USA. April.

Phil Savoie / Red-winged blackbird (Agelaius phoeniceus) female collecting mayfly prey to feed chicks, Madison River, Bozeman, Montana, USA. May.

Phil Savoie / Red winged blackbird (Agelaius phoeniceus) male singing, Bozeman, Montana, USA. June.

Phil Savoie / Red winged blackbird (Agelaius phoeniceus), female feeding chick at nest, Bozeman, Montana, USA. April.

Phil Savoie / Red winged blackbird (Agelaius phoeniceus), female feeding chick at nest, Bozeman, Montana, USA. April.

Phil Savoie / Red-winged blackbird (Agelaius phoeniceus) female collecting mayfly prey to feed chicks, Madison River, Bozeman, Montana, USA. May.

Phil Savoie / Red winged blackbird (Agelaius phoeniceus), collecting mayfly prey for chicks, Bozeman, Montana, USA. April.

Phil Savoie / Red-winged blackbird (Agelaius phoeniceus) female collecting mayfly prey to feed chicks, Madison River, Bozeman, Montana, USA. May.

Phil Savoie / Red winged blackbird (Agelaius phoeniceus) male perched Bozeman, Montana, USA. June.

Phil Savoie / Red winged blackbird (Agelaius phoeniceus) female collecting food, Bozeman, Montana, USA, June.

Phil Savoie / Red winged blackbird (Agelaius phoeniceus) female with insect prey for chicks, Bozeman, Montana, USA. June.

Phil Savoie / Red winged blackbird (Agelaius phoeniceus), female feeding chick at nest, Bozeman, Montana, USA. April.

Phil Savoie / Red winged blackbird (Agelaius phoeniceus), collecting mayfly prey for chicks, Bozeman, Montana, USA. April.

Phil Savoie / Red winged blackbird (Agelaius phoeniceus), collecting mayfly prey for chicks, Bozeman, Montana, USA. April.

Phil Savoie / Red winged blackbird (Agelaius phoeniceus), collecting mayfly prey for chicks, Bozeman, Montana, USA. April.

Phil Savoie / Red-winged blackbird (Agelaius phoeniceus) female collecting mayfly prey to feed chicks, Madison River, Bozeman, Montana, USA. May.

Phil Savoie / Red-winged blackbird (Agelaius phoeniceus) female collecting mayfly prey to feed chicks, Madison River, Bozeman, Montana, USA. May.

Phil Savoie / Red winged blackbird (Agelaius phoeniceus), female in nest, Montana, USA, May.

Phil Savoie / Red winged blackbird (Agelaius phoeniceus) bathing, Bozeman, Montana, USA, May.

Phil Savoie / Red winged blackbird (Agelaius phoeniceus) male singing, Bozeman, Montana, USA. April.

Phil Savoie / Red winged blackbird (Agelaius phoeniceus) male singing, Bozeman, Montana, USA. April.

Phil Savoie / Red winged blackbird (Agelaius phoeniceus) male singing, Bozeman, Montana, USA. April.

Ingo Arndt / Red-winged Blackbird (Agelaius phoeniceus) flock flying in winter, Missouri

Donald M. Jones / Red-winged Blackbird (Agelaius phoeniceus) male in territorial display, Troy, Montana

George Sanker / Red-winged blackbird (Agelaius phoeniceus) rear view, in breeding plumage, calling during mating season. Acadia National Park, Maine, USA June

Doug Wechsler / Red-winged blackbird (Agelaius phoeniceus) female, Philadelphia, USA June

Gerrit Vyn / Red-winged blackbird (Agelaius phoeniceus) attacking a Sandhill crane (Grus canadensis) in a flooded pasture. Cranes will predate the nests of blackbirds. Sublette County, Wyoming. May.

Gerrit Vyn / Red-winged Blackbird (Agelaius phoeniceus) nest and eggs. Sublette County, Wyoming. June.

Steve Gettle / Red-winged Blackbird (Agelaius phoeniceus) male calling, J. Clark Salyer National Wildlife Refuge, North Dakota

Steve Gettle / Red-winged Blackbird (Agelaius phoeniceus) male calling, J. Clark Salyer National Wildlife Refuge, North Dakota

Steve Gettle / Red-winged Blackbird (Agelaius phoeniceus) male in territorial display, J. Clark Salyer National Wildlife Refuge, North Dakota

George Sanker / Red-winged blackbird (Agelaius phoeniceus) in breeding plumage, calling during mating season, Acadia National Park, Maine, USA June

Roger Powell / Red-winged blackbird (Agelaius phoeniceus) male singing and displaying on a post in its breeding territory, La Chua Trail, Paynes Prairie, Gainsville, Florida, USA April

Marie Read / Red-winged Blackbird (Agelaius phoeniceus) male singing from ice-covered branch in early spring, Ithaca, New York, USA.

Jim Brandenburg / Red-winged Blackbird (Agelaius phoeniceus) male calling, Minnesota

John Cancalosi / Red-winged blackbird (Agelaius phoeniceus) male in territorial display, Virginia, USA. May.

Scott Leslie / Red-winged Blackbird (Agelaius phoeniceus) female, Florida

Alan Murphy / Red-winged Blackbird (Agelaius phoeniceus) male flying, Texas

Alan Murphy / Red-winged Blackbird (Agelaius phoeniceus) male calling in territorial display, Texas

Alan Murphy / Red-winged Blackbird (Agelaius phoeniceus) male, Texas

Alan Murphy / Red-winged Blackbird (Agelaius phoeniceus) female balancing, Texas

Oscar Diez / Red-winged Blackbird (Agelaius phoeniceus) male calling, Alberta, Canada

Bill Morales / Red-winged Blackbird (Agelaius phoeniceus) females, Maryland

Charlie Summers / Female Red-winged blackbird (Agelaius phoeniceus) taking off from perch, Red-Tailed Park, Aurora, Colorado, USA. June.

Charlie Summers / Male Red-winged blackbird (Agelaius phoeniceus) Red-tailed Park, Aurora, Colorado, USA. June.

Charlie Summers / Female Red-winged blackbird (Agelaius phoeniceus) taking off, Red-tailed park, Aurora, Colorado, USA. May.

Agustin Esmoris / Red-winged Blackbird (Agelaius phoeniceus), Montreal, Quebec, Canada

Marie Read / Male Red winged blackbird (Agelaius phoeniceus) taking off, New York, USA, May

Marie Read / Female Red winged blackbird (Agelaius phoeniceus) calling and performing wingspread display on bulrush, New York, USA, May.

Marie Read / Red-winged blackbird (Agelaius phoeniceus) nest containing four eggs, in cattail marsh, New York, USA, June.

Marie Read / Three Red winged blackbird (Agelaius phoeniceus) chicks in nest with beaks wide open, about 6 days, eyes just starting to open, Ithaca, New York, USA, June.

Charlie Summers / Redwinged Blackbird (Agelaius phoeniceus) mumuration. Bosque del Apache, New Mexico, December.

David Tipling / Red-winged Blackbird (Agelaius phoeniceus) singing at dawn, Florida, Everglades, USA, March.

MYN / Juanjo Segura / Red-winged Blackbird (Agelaius phoeniceus) calling to another in flight, Arroyo Seco, New Mexico, USA, December. Meetyourneighbours.net project

Robert Royse / Red-winged Blackbird (Agelaius phoeniceus) male, Ohio

Robert Royse / Red-winged Blackbird (Agelaius phoeniceus), Ohio

Robert Royse / Red-winged Blackbird (Agelaius phoeniceus) female, Ohio

Alan Murphy / Red-winged Blackbird (Agelaius phoeniceus) male and female, Texas

Alan Murphy / Red-winged Blackbird (Agelaius phoeniceus) male, Texas

Alan Murphy / Red-winged Blackbird (Agelaius phoeniceus) male, Texas

Alan Murphy / Red-winged Blackbird (Agelaius phoeniceus) male, Texas

Cyril Ruoso / Red-winged Blackbird (Agelaius phoeniceus) female in grass, southern Texas

David Tipling / Red-winged Blackbird (Agelaius phoeniceus) in flight over water, Florida Everglades, USA

John Cancalosi / Red-winged Blackbird (Agelaius phoeniceus) male calling. New York, USA, May.

Mark Carwardine / Red-winged blackbird (Agelaius phoeniceus) flock flying, Bosque del Apache National Wildlife Refuge, New Mexico, USA