David Gallan / Male Satin bowerbird (Ptilonorhynchus violaceus) courting female on suburban street verge, bower filled with blue plastic, Australia, October 2018.

David Pattyn / Alpine chough (Pyrrhocorax graculus) group in flight, Bernese Alps, Switzerland, November

Markus Varesvuo / Alpine choughs (Pyrrhocorax graculus) flying over snow covered mountain with tracks from snow boarders in the snow, Morocco, February 2009

David Pattyn / Alpine chough (Pyrrhocorax graculus) in flight. Stelvio National Park, Italian Alps, Solda, Sulden am Ortler, Sudtirol, Italy. January 2013.

Fabrice Cahez / Red-billed chough (Pyrrhocorax pyrrhocorax) perched on rock with one on right calling, Gorges du tarn, France, January.

Philippe Clement / Alpine Chough / Yellow-billed Chough (Pyrrhocorax graculus) flock in flight against mountains, Dolomites, Italy. Digital composite.

Nick Upton / Alpine / Yellow-billed chough (Pyrrhocorax graculus) flying past waterfall and sheer cliffs of the Cirque de Gavarnie, Haute Pyrenees, France.

Angelo Gandolfi / Peregrine Falcon (Falco peregrinus) hunting Alpine Chough (Pyrrhocorax graculus). Pyrenees, Aragon, Spain.

Angelo Gandolfi / Alpine chough (Pyrrhocorax graculus) in karst mountains of Picos de Europa National Park, Cantabria, Spain.

Wild Wonders of Europe / Giesbers / Alpine chough (Pyrrhocorax graculus) perching on wood with feathers ruffled, Liechtenstein, June 2009

Wild Wonders of Europe / Schandy / Mount Donguzorun (4,448m) with Yellow-billed / Alpine chough (Pyrrhocorax graculus) flying, Caucasus, Russia, June 2008.

Wild Wonders of Europe / Schandy / Apline / Yellow-billed chough (Pyrrhocorax graculus) in flight, Mount Elbrus, Caucasus, Russia, June 2008