Andy Rouse / Black headed bunting, (Emberiza melanocephala), catching flies on sunflower crop, Bulgaria, June.

Ernie Janes / House sparrow (Passer domesticus) in building, Scottish borders, UK, July.

Donald M. Jones / Clay-colored Sparrow (Spizella pallida), Montana

David Perpinan / Common rock sparrow (Petronia petronia) feeding chicks in nest, filmed using an infra-red camera, Cuenca, Castile-La Mancha, Spain, June.

David Perpinan / Common rock sparrow (Petronia petronia) chick exploring outside nest, Cuenca, Castile-La Mancha, Spain, June.

David Perpinan / Adult Common rock sparrow (Petronia petronia) feeding chicks, Cuenca, Castile-La Mancha, Spain, June.

David Perpinan / Female Rock sparrow (Petronia petronia) feeding chick inside nest, filmed with an infrared camera, Spain, June.

David Perpinan / Rock sparrow (Petronia petronia) feeding chick outside nest, Spain, June.

Nick Saunders/ BIA / Le Conte's Sparrow (Ammodramus leconteii), Saskatchewan, Canada

Alan Murphy/ BIA / Grasshopper Sparrow (Ammodramus savannarum) male calling, Arizona

Donald M. Jones / Song Sparrow (Melospiza melodia), western Montana

Alan Murphy / Savannah Sparrow (Passerculus sandwichensis), British Columbia, Canada