Sue Flood / Chestnut mandibled toucan (Ramphastos ambiguus swainsonii) near Boca Tapada, Costa Rica. January 2011

Diane McAllister / Swainson's Hawk juvenile (Buteo swainsonii) stretching its wings while perched on a fence in rural Palomino Valley. Nevada, USA, August

Mary McDonald / Chestnut-mandibled Toucan (Ramphastos ambiguus swainsonii) adult bird perched on the edge of the forest. Laguana del Lagarto, Costa Rica, Central America.

Neil Lucas / Chestnut mandibled toucan, Panama, Central America

Hanne & Jens Eriksen / Swainson's hawk (Buteo swainsoni) in flight. Saskatchewan, Canada, August.

Marie Lochman / Dusky antechinus (Antechinus swainsonii) Australian Alps, Kosciuszko NP, New South Wales, Australia.

Marie Lochman / Dusky antechinus (Antechinus swainsonii) Australian Alps, Kosciuszko NP, New South Wales, Australia.

Jiri Lochman / Dusky antechinus (Antechinus swainsonii) female with pouch young protruding out of the pouch, Kosciuszko NP, New South Wales, Australia.

Jiri Lochman / Dusky antechinus (Antechinus swainsonii) female with pouch young protruding out of the pouch, Kosciuszko NP, New South Wales, Australia.

Jiri Lochman / Dusky Antechinus (Antechinus swainsonii) Kosciuszko NP, New South Wales, Australia.

Jiri Lochman / Dusky antechinus (Antechinus swainsonii) female with pouch young protruding out of the pouch, Kosciuszko NP, New South Wales, Australia.

Jiri Lochman / Dusky antechinus (Antechinus swainsonii) Kosciuszko NP, New South Wales, Australia.

Jiri Lochman / Dusky antechinus (Antechinus swainsonii) Kosciuszko NP, New South Wales, Australia.

Konrad Wothe / Swainson's thrush (Catharus ustulatus), rainforest, North-Ecuador.

Konrad Wothe / Swainson's toucan (Ramphastos ambiguus swainsonii) portrait, Costa Rica

Alan Murphy/ BIA / Swainson's Hawk (Buteo swainsoni) flying, Texas

Nick Hawkins / Black-mandibled toucan (Ramphastos ambiguus swainsonii) in the lowland rainforests, Southeastern Nicaragua. August.

Philippe Clement / Baby looking at tame Rainbow lorikeet / Swainson's Lorikeet (Trichoglossus moluccanus) - native to Australia - being fed by hand in zoo.

Doug Wechsler / Chestnut-mandibled toucan (Ramphastos swainsonii) eating guava fruit, Province El Oro, Buenaventura Biological Reserve, Ecuador, March

Alan Murphy/ BIA / Swainson's Thrush (Catharus ustulatus) calling, British Columbia, Canada

Alan Murphy/ BIA / Swainson's Thrush (Catharus ustulatus) calling, British Columbia, Canada

Alan Murphy/ BIA / Swainson's Thrush (Catharus ustulatus) calling, British Columbia, Canada

Suzi Eszterhas / Chestnut-mandibled toucan (Ramphastos swainsonii) Osa Peninsula, Costa Rica.

Suzi Eszterhas / Chestnut-mandibled toucan (Ramphastos swainsonii) Osa Peninsula, Costa Rica.

Donald M. Jones / Swainson's Thrush (Catharus ustulatus) at pond, western Montana

Donald M. Jones / Swainson's Thrush (Catharus ustulatus) at pond, western Montana

Neil Aldridge / Swainson's spurfowl (Pternistis swainsonii) standing alert, while a juvenile takes a dust bath, Chobe River, Chobe National Park, Botswana.

Gabriel Rojo / Swainson's hawk (Buteo swainsoni) La Pampa, Argentina.

Ashish & Shanthi Chandola / Swainson's spurfowl (Pternistis swainsonii) Kruger National Park, South Africa, July.

Ashish & Shanthi Chandola / Swainson's spurfowl (Pternistis swainsonii) Kruger National Park, South Africa, July.

Alan Murphy / Swainson's Thrush (Catharus ustulatus), Texas

Alan Murphy / Swainson's Thrush (Catharus ustulatus), Texas

Alan Murphy / Swainson's Thrush (Catharus ustulatus), Texas

Nick Saunders / Swainson's Thrush (Catharus ustulatus), Saskatchewan, Canada

Alan Murphy / Swainson's Thrush (Catharus ustulatus), Texas

Nick Saunders / Swainson's Thrush (Catharus ustulatus), Saskatchewan, Canada

Robert Royse / Swainson's Thrush (Catharus ustulatus), Maine

Jacob S. Spendelow / Swainson's Thrush (Catharus ustulatus), Alaska

Alan Murphy / Swainson's Thrush (Catharus ustulatus), Texas

Alan Murphy / Swainson's Warbler (Limnothlypis swainsonii), Texas

E.J. Peiker / Swainson's Hawk (Buteo swainsoni), Arizona

Chien Lee / Swainson's Spurfowl (Francolinus swainsonii), Kruger National Park, South Africa

David Tipling / Chestnut-mandibled Toucan (Ramphastos swainsonii) La Selva, Costa Rica

Richard Du Toit / Swainson's Spurfowl (Francolinus swainsonii) drinking rainwater from tar road, Kruger National Park, South Africa

Christophe Courteau / Swainson's Francolin (Franconlinus swainsonii / Pternistes swainsonii) perched on top of a termite mound, Okavango Delta, Botswana

Christophe Courteau / Swainson's Francolin (Franconlinus swainsonii / Pternistes swainsonii) perched on top of a termite mound, Okavango Delta, Botswana

Christophe Courteau / Swainson's Francolin / Spurfowl calling from top of termite mound (Francolinus / Pternistes swainsonii)) Okavango Delta , Botswana

Loic Poidevin / Swainson's thrush (Catharus ustulatus) Pointe Pelée, Ontario, Canada May

Konrad Wothe / Chestnut mandibled / Swainson's Toucan (Ramphastos ambiguus swainsonii) Costa Rica

Todd Mintz / Swainson's hawk (Buteo swainsoni) spring arrival, Saskatchewan, Canada, March

Sue Flood / Chestnut mandibled toucan (Ramphastos ambiguus swainsonii) near Boca Tapada, Costa Rica. January 2011.

Sue Flood / Chestnut mandibled toucan (Ramphastos ambiguus swainsonii) near Boca Tapada, Costa Rica. January 2011.

Sue Flood / Chestnut Mandibled toucan (Ramphastos ambiguus swainsonii) Nnar Boca Tapada, Costa Rica. Januar

Tony Heald / Swainson's Spurfowl / Francolin (Francolinus swainsonii) in profile. Etosha National Park, Namibia, January.

Steve Gettle / Swainson's Thrush (Catharus ustulatus), Crane Creek State Park, Ohio

Steve Gettle / Swainson's Thrush (Catharus ustulatus), Crane Creek State Park, Ohio

Steve Gettle / Swainson's Thrush (Catharus ustulatus), Crane Creek State Park, Ohio

Steve Gettle / Swainson's Thrush (Catharus ustulatus), Crane Creek State Park, Ohio

Steve Gettle / Swainson's Thrush (Catharus ustulatus), Crane Creek State Park, Ohio

Steve Gettle / Swainson's Thrush (Catharus ustulatus), Crane Creek State Park, Ohio

Steve Gettle / Swainson's Thrush (Catharus ustulatus), Crane Creek State Park, Ohio

Mary McDonald / Chestnut-mandibled Toucan (Ramphastos ambiguus swainsonii) adult bird perched on the edge of the forest. Laguana del Lagarto, Costa Rica, Central America.

Barry Mansell / Chestnut mandible toucan (Ramphastos ambiguus swainsonii) perched on post, South America

Donald M. Jones / Swainson's Thrush (Catharus ustulatus), eastern Montana

Donald M. Jones / Swainson's Thrush (Catharus ustulatus), eastern Montana

Donald M. Jones / Swainson's Thrush (Catharus ustulatus), eastern Montana

Donald M. Jones / Swainson's Thrush (Catharus ustulatus) bathing, eastern Montana

Donald M. Jones / Swainson's Thrush (Catharus ustulatus), eastern Montana

Donald M. Jones / Swainson's Hawk (Buteo swainsoni) flying, central Wyoming

Donald M. Jones / Swainson's Hawk (Buteo swainsoni), central Wyoming

Jouan & Rius / Chestnut mandibled / Swainson's Toucan,(Ramphastos ambiguus swainsonii), Braulio Carrillo NP, Costa Rica

Barry Mansell / Swainson's / Olive-backed thrush (Catharus ustulatus) High Island, Texas, USA

Philippe Clement / Swainson's Francolin (Francolinus swainsonii) foraging, Kruger NP, South Africa

Philippe Clement / Swainson's Francolin (Francolinus swainsonii) standing on a stone marker, Kruger NP, South Africa

Tom Vezo / Swainson's Thrush (Catharus ustulatus), Rio Grande Valley, Texas

Barry Mansell / Swainson's warbler (Limnothlypis swainsonii) Texas, USA

Tom Vezo / Swainson's Thrush (Catharus ustulatus) portrait, Rio Grande Valley, Texas

David Welling / Swainson's hawk {Buteo swainsonii} at water, Texas, USA

Shattil & Rozinski / Swainson's hawk {Buteo swainsonii} Colorado, USA

Tom Vezo / Swainson's hawk juvenile near nest {Buteo swainsonii} Arizona, USA Chiricahua mountains

Rolf Nussbaumer / Swainson's hawk {Buteo swainsonii} adult calling on fence post, Rocksprings, Wyoming, USA

TOM MANGELSEN / Swaison's hawk landing. (Buteo swainsonii) Wyoming, USA.

Tom Vezo / Swainson's Hawk (Buteo swainsoni) perched on fencepost, Sulphur Springs Valley, Arizona

Tom Vezo / Swainson's Hawk (Buteo swainsoni) juvenile flying, Cape May, New Jersey

Tom Vezo / Swainson's Hawk (Buteo swainsoni) juvenile at nest, Chiricahua Mountains, Arizona

Jim Brandenburg / Swainson's Thrush (Catharus ustulatus) perched in the Northwoods, Minnesota

Neil Lucas / Chestnut mandibled toucan. (Ramphastos ambiguus swainsonii) Panama

TOM MANGELSEN / Swaison's hawk soaring. (Buteo swainsonii) Wyoming, USA

Tom Vezo / Swainson's hawk {Buteo swainsonii} Arizona, USA, North America

Donald M. Jones / Swainson's Thrush (Catharus ustulatus) male calling in spring, Montana

Donald M. Jones / Swainson's Thrush (Catharus ustulatus) male calling in spring, Montana

E.J. Peiker/ BIA / Swainson's Thrush (Catharus ustulatus), Texas

Alan Murphy/ BIA / Swainson's Warbler (Limnothlypis swainsonii) calling, Texas

Todd Mintz / Swainson's hawk (Buteo swainsoni) spring arrival, Saskatchewan, Canada, March

Mike Read / Swainson's hawk (Buteo swainsoni) perched on branch, West Yellowstone, USA, June

Mike Read / Swainson's hawk (Buteo swainsoni) on branch, West Yellowstone, USA, June