Rolf Nussbaumer / White-crowned Sparrow (Zonotrichia leucophrys) on branches covered in frost, Bosque del Apache National Wildlife Refuge, New Mexico, USA. December 2003

Gabriel Rojo / Rufous collared sparrow {Zonotrichia capensis} El Condorito NP, Argentina

Oscar Dewhurst / Rufous-collared sparrow (Zonotrichia capensis) on stone pavement. Cusco, Peru. February

Thomas Marent / Rufous-collared Sparrow (Zonotrichia capensis), Tatama National Park, Colombia

Karine Aigner / Portrait of a White-throated sparrow, (Zonotrichia albicollis) with white background, Block island, Rhode Island, USA. Bird caught during scientific research.

Oliver Hellowell / White crowned sparrow (Zonotrichia leucophrys) in Smoky Mountains, Tennessee, USA. November.

Donald M. Jones / White-throated Sparrow (Zonotrichia albicollis) in autumn, Troy, Montana

Tim Zurowski/ BIA / White-crowned Sparrow (Zonotrichia leucophrys), British Columbia, Canada

Agustin Esmoris / Rufous-collared Sparrow (Zonotrichia capensis), Argentina

Nick Hawkins / Volcano junco (Junco vulcani) an endemic bird species, Talamanca Range, Talamanca Range-La Amistad Reserves / La Amistad National Park UNESCO Natural World Heritage Site, Costa Rica. Small repro only...

Nick Hawkins / Volcano junco (Junco vulcani) endemic to the southern highlands of Costa Rica.

Scott Leslie / White-throated Sparrow (Zonotrichia albicollis) male calling in spring, Nova Scotia, Canada