Rosl Roessner/ BIA / Boat-tailed Grackle (Quiscalus major) male, Florida

Nick Saunders/ BIA / Common Grackle (Quiscalus quiscula), Saskatchewan, Canada

George Sanker / Common grackle (Quiscalus quiscula) male in breeding plumage calling, Acadia National Park, Maine, USA May

Roger Powell / Male Boat-tailed grackle (Quiscalus major) perched on an old rope howser and singing, Cedar Key, Levy County, Florida, USA, April

Alan Murphy/ BIA / Common Grackle (Quiscalus quiscula), Texas

Cyril Ruoso / Great tailed grackle (Quiscalus mexicanus) displaying, South Texas, USA, April.

Cyril Ruoso / Great tailed grackle (Quiscalus mexicanus) displaying on telephone wire, South Texas, USA, April.

Ingo Arndt / Boat-tailed Grackle (Quiscalus major) group calling, Florida

Scott Leslie / Boat-tailed Grackle (Quiscalus major) male calling, Viera Wetlands, Florida

Ben Cranke / Giant Cowbird (Molothrus oryzivorus) perched on a palm tree frond, Mato Grosso, Pantanal, Brazil. August.

Luiz Claudio Marigo / Giant Cowbird (Molothrus oryzivorus) at Pixaim River, Pantanal of Mato Grosso, Mato Grosso State, Western Brazil.

Luiz Claudio Marigo / Giant Cowbird (Molothrus oryzivorus) at Pixaim River, Pantanal of Mato Grosso, Mato Grosso State, Western Brazil.