George Sanker / Mourning Dove (Zenaida macroura) perched on branch in snow, Acadia National Park, Maine, USA, February.

LYNN M. STONE / Mourning dove {Zenaida macroura} perched in snow, USA.

Tom Vezo / Mourning dove {Zenaida macroura} Tucson, Arizona, USA

John Chan / Mourning dove (Zenaida macroura) perched on a Coastal pricklypear (Opuntia littoralis), avoiding the spines as it takes flight, Southern California, USA, April.

Alan Murphy/ BIA / Mourning Dove (Zenaida macroura), Texas

George Sanker / Mourning Dove (Zenaida macroura) perched on snowy branch, Acadia National Park, Maine, USA, February.

Claudio Contreras / Clarion Island Mourning Dove (Zenaida macroura clarionensis), Clarion Island, Revillagigedo Archipelago Biosphere Reserve / Archipielago de Revillagigedo UNESCO Natural World Heritage Site (Socorro Is...

Claudio Contreras / Clarion Island Mourning Dove (Zenaida macroura clarionensis), Clarion Island, Revillagigedo Archipelago Biosphere Reserve / Archipielago de Revillagigedo UNESCO Natural World Heritage Site (Socorro Is...

Mary McDonald / Mourning dove (Zenaida macroura) drinking at watering hole, Madera Canyon, Arizona, USA, April.

Marie Read / Mourning Dove (Zenaida macroura) sunbathing on the ground in summer, New York, USA. September.

Marie Read / Mourning dove (Zenaida macroura), adult incubating on nest, New York, USA, June.

Scott Leslie / Mourning Dove (Zenaida macroura), Maine

Alan Murphy / Mourning Dove (Zenaida macroura), Texas

Alan Murphy / Mourning Dove (Zenaida macroura), Texas

Denis-Huot / Mourning collared dove (Streptopelia decipiens) and red eyed dove (Streptopelia semitorquata), lake Magadi, Kenya, September.

Alan Murphy / Mourning Dove (Zenaida macroura), Texas

Donald M. Jones / Mourning Dove (Zenaida macroura), Columbus Ohio

Matthew Studebaker / Mourning Dove (Zenaida macroura), Ohio

Jiri Slama / Mourning Dove (Streptopelia decipiens), Kunene, Namibia

Alan Murphy / Mourning Dove (Zenaida macroura), Texas

Alan Murphy / Mourning Dove (Zenaida macroura), Texas

LYNN M. STONE / Mourning Dove (Zenaida macroura) foraging on pile of ear corn, in the snow, St. Charles, Illinois, USA, March

LYNN M. STONE / Mourning dove (Zenaida macroura) perched on pile of ear corn in the snow, St. Charles, Illinois, USA, March

Loic Poidevin / Mourning dove (Zenaida macroura) two in tree, Pointe Pelee, Ontario, Canada, May

Tom Vezo / Mourning Dove (Zenaida macroura), Green Valley, Arizona

Scott Leslie / Mourning Dove (Zenaida macroura) group in winter, Nova Scotia, Canada

Scott Leslie / Mourning Dove (Zenaida macroura) group in winter, Nova Scotia, Canada

Steve Gettle / Mourning Dove (Zenaida macroura), Huron Meadows Metropark, Michigan

Diane McAllister / Mourning dove (Zenaida macroura) perched on a Sycamore tree branch in the early morning light in a backyard in Reno. Nevada, USA, January

Shattil & Rozinski / Mourning dove {Zenaida macroura} on Mullein seedhead, Colorado, USA,

Scott Leslie / Mourning Dove (Zenaida macroura), Granville Beach, Nova Scotia, Canada

John Cancalosi / Mourning Dove (Zenaida macroura) USA

John Cancalosi / Mourning Dove (Zenaida macroura) bathing in temporary pool, Sonoran desert, Arizona, USA

Tom Vezo / Mourning Dove (Zenaida macroura) female brooding chicks on nest, Santa Rita Mountains, Arizona

Tom Vezo / Mourning Dove (Zenaida macroura) female brooding chicks on nest, Santa Rita Mountains, Arizona

Rolf Nussbaumer / Mourning Dove {Zenaida macroura} at water next to Texas Bluebonnet flowers (Lupinus texensis) Hill Country, Texas, USA

Rolf Nussbaumer / Mourning Dove {Zenaida macroura} on nest with chicks, Rio Grande Valley, Texas, USA

Rolf Nussbaumer / Mourning Dove {Zenaida macroura} on nest with large chick, Rio Grande Valley, Texas, USA

Patricio Robles Gil / Mourning Dove (Zenaida macroura) pair cooing in bush, Sierra del Carmen region, Mexico

Patricio Robles Gil / Mourning Dove (Zenaida macroura) drinking from waterhole, Sierra del Carmen region, Mexico

Rolf Nussbaumer / Mourning Dove (Zenaida macroura) nest to water, Lake Corpus Christi, Texas, USA. May 2003

Rolf Nussbaumer / Mourning Dove (Zenaida macroura) pair mating, Lake Corpus Christi, Texas, USA. May 2003

Rolf Nussbaumer / Portrait of Mourning Dove (Zenaida macroura) Lake Corpus Christi, Texas, USA. May 2003

Rolf Nussbaumer / Mourning Dove (Zenaida macroura) with Wildflower, Starr County, Rio Grande Valley, Texas, USA. May 2002

Rob Tilley / Mourning dove (Zenaida macroura) nest with eggs, on Desert Prickly Pear cactus (Opuntia), Casa Grande, Arizona, USA

Tom Vezo / Mourning Dove (Zenaida macroura) portrait, Green Valley, Arizona

John Cancalosi / Mourning Dove (Zenaida macroura) drinking from temporary pool, Sonoran Desert, Arizona, USA

Shattil & Rozinski / Mourning dove {Zenaida macroura} Colorado, USA

Shattil & Rozinski / Mourning dove {Zenaida macroura} sleeping, Colorado, USA

John Cancalosi / Portrait of Mourning dove (Zenaida macroura), Sonoran Desert, AZ, USA

John Cancalosi / Mourning Dove {Zenaida macroura} drinking from temporary pool, Sonoran Desert, Arizona.

John Cancalosi / Mourning dove {Zenaida macroura} bathing, Arizona, USA.

David Welling / Mourning dove {Zenaida macroura} perched on post, Texas, USA

John Cancalosi / Mourning dove on dead cactus {Zenaida macroura} Arizona, Sonoran Desert, USA.

Tom Vezo / Mourning dove {Zenaida macroura} Arizona, USA Green valley

Tom Vezo / Mourning dove {Zenaida macroura} Arizona, USA

Tom Vezo / Mourning dove bathing {Zenaida macroura} Arizona, USA.

David Kjaer / Mourning dove pair at nest {Zenaida macroura} Arizona, USA

David Kjaer / Mourning dove {Zenaida macroura} Arizona, USA

John Cancalosi / Mourning dove at nest with chicks {Zenaida macroura} Arizona, USA. Sonoran desert

Rolf Nussbaumer / Mourning dove pair {Zenaida macroura} Texas, USA.

Tom Vezo / Prairie Falcon (Falco mexicanus) with Mourning Dove (Zenaida macroura), Arizona

Tim Fitzharris / Mourning Dove (Zenaida macroura) pair perching on branch, North America

John Cancalosi / Mourning dove {Zenaida macroura} on Cholla cactus, Sonoran Desert, Arizona, USA

Doug Wechsler / Mourning dove nesting on sculpture of Christ {Zenaida macroura} PA, USA

John Cancalosi / Mourning dove (Zenaida macroura) at nest feeding young, in cactus, Arizona, USA Sonoran Desert.

John Cancalosi / Mourning dove (Zenaida macroura) on nest in Saguaro, Arizona, USA Sonoran Desert. Nest in Saguaro cactus.

John Cancalosi / Mourning dove (Zenaida macroura) on nest in saguaro cactus, Arizona, USA Sonoran Desert.

George McCarthy / Mourning dove on ground, Everglades, Florida, USA

Winfried Wisniewski / Mourning Dove (Streptopelia decipiens) flying, Serengeti National Park, Tanzania

Winfried Wisniewski / Mourning Dove (Streptopelia decipiens) landing at waterhole, Serengeti National Park, Tanzania

Winfried Wisniewski / Mourning Dove (Streptopelia decipiens) landing at waterhole, Serengeti National Park, Tanzania

Winfried Wisniewski / Mourning Dove (Streptopelia decipiens) and Ring-necked Dove (Streptopelia capicola) at waterhole, Serengeti National Park, Tanzania

Scott Leslie / Mourning Dove (Zenaida macroura) in winter, North America

Alan Murphy / Mourning Dove (Zenaida macroura), Texas

John Cancalosi / Mourning dove {Zenaida macroura} on nest in cactus with chicks, Sonoran Desert, Arizona, USA

Rob Tilley / Two Mourning doves (Zenaida macroura) at waters edge, Santa Clara Ranch, Rio Grande Valley, Texas, USA

Scott Leslie / Mourning Dove (Zenaida macroura), North America

George Sanker / Mourning dove (Zenaida macroura) perched on snow covered branch, Acadia National Park, Maine, USA. January.

Roland Seitre / Four Mourning collared doves (Streptopelia decipiens) drinking at edge of lake, Lac de Guiers, Ferlo, Senegal.

Lynn M. Stone / Mourning dove (Zenaida macroura) perched on branch in snow, Milford, Connecticut, USA. January.

Lynn M. Stone / Mourning dove (Zenaida macroura) perched on branch in snow storm; Milford, Connecticut, USA. February.

Charlie Hamilton-James / Conservationists burning dead African mourning doves (Streptopelia decipiens) poisoned by illegal pesticide spraying, to protect crops from feeding birds, Bunyala Rice Scheme, Kenya, Africa. November,...

Charlie Hamilton-James / Conservationist holding two dead African mourning doves (Streptopelia decipiens) poisoned for human consumption, Bunyala Rice scheme, Western Kenya, Africa. November, 2015.

Charlie Hamilton-James / Conservationist holding two dead African mourning doves (Streptopelia decipiens) with a pile of more dead birds collected in a rice paddy, poisoned for human consumption, Bunyala Rice scheme, Western...

Charlie Hamilton-James / Conservationist holding dead African mourning doves (Streptopelia decipiens) and Speckled pigeon (Columba guinea) killed by poison and collected from the poisoning site, Bunyala Rice scheme, Western K...

Charlie Hamilton-James / Conservationist holding dead African mourning doves (Streptopelia decipiens) killed by poison and collected from the poisoning site, Bunyala Rice scheme, Western Kenya, Africa. November, 2015.

Charlie Hamilton-James / Conservationist holding dead African mourning doves (Streptopelia decipiens) killed by poison and collected from the poisoning site, Bunyala Rice scheme, Western Kenya, Africa. November, 2015.

Karine Aigner / Three Mourning doves (Zenaida macroura) drinking at water's edge, Texas, USA. March.

Steve Gettle / Mourning Dove (Zenaida macroura) drinking, Rio Grande Valley, Texas

John Cancalosi / Mourning dove (Zenaida macroura) adult and squab on nest in Cholla cactus (Cylindropuntia sp.) Sonoran Desert, Arizona, USA.

John Cancalosi / Mourning dove (Zenaida macroura) adult and squab on nest in Cholla cactus (Cylindropuntia sp.) Sonoran Desert, Arizona, USA.

George Sanker / Mourning dove (Zenaida macroura) drinking, Acadia National Park, Maine, USA.

Marie Read / Mourning dove (Zenaida macroura) perched on snow-covered branch in winter, Ithaca, New York, USA, February.

Marie Read / Mourning dove (Zenaida macroura) pair at nest, male has brought nest material (rootlets) and is leaning over incubating female to add it to the nest. Ithaca, New York, USA, April.

Marie Read / Mourning dove (Zenaida macroura) incubating on nest in corner of a building. The dove nest has been built on top of two old nests (possibly of American Robin and/or House Finch) from previous years, I...