Bence Mate / Red-legged honeycreeper (Cyanerpes cyaneus) two males on barbed wire. Costa Rica.

Gabriel Rojo / Saffron finch (Sicalis flaveola) on barbed wire, La Pampa, Argentina

Terry Whittaker / Arctic terns (Sterna paradisaea) with house in background, Flatey Island, Breioafjorour, Iceland. July

Andres M. Dominguez / Corn bunting (Emberiza calandra) singing, Prado del rey, Cadiz, Spain, March.

Shattil & Rozinski / Dead Great horned owl (Bubo virginianus) caught on a barbed wire fence, Colorado, USA, September.

Robin Chittenden / Red-breasted Blackbird (Sturnella militaris) singing on barbed wire in the rain, Trinidad, Trinidad and Tobago, April

Nick Upton / Jackdaw (Corvus monedula) standing on a clifftop fence post with the sea in the background, Polzeath, Cornwall, UK, April.

Nick Upton / Jackdaw (Corvus monedula) standing on a clifftop fence post with the sea in the background, Polzeath, Cornwall, UK, April.

Philippe Clement / Dead Lapwing {Vanellus vanellus} caught in barbed wire, Flanders, Belgium.

Tom Vezo / Mountain Bluebird (Sialia currucoides) male perching on barbwire fence with prey in beak, Montana