David Pattyn / Alpine chough (Pyrrhocorax graculus) sitting on a lens of a wildlife photographer, Leukerbad, Vallais, Wallis, Switzerland, January

David Pattyn / Bearded vulture (Gypaetus barbatus) in flight over winter landscape with snow, Leukerbad, Vallais, Wallis, Switzerland, January

David Pattyn / Bearded vulture (Gypaetus barbatus) in flight in front of a rock wall, Leukerbad, Vallais, Wallis, Switzerland, January

David Pattyn / Bearded vulture (Gypaetus barbatus) in flight, Leukerbad, Vallais, Wallis, Switzerland, January

David Pattyn / Alpine accentor (Prunella collaris) in snow, Leukerbad, Vallais, Wallis, Switzerland, January

Martin van Lokven / Alpine Ibex (Capra ibex) male, Saas Fee, Wallis, Switzerland

Heike Odermatt / Sunlight hitting mountain, Aletsch Glacier, Wallis, Swiss Alps, Switzerland

Eric Dragesco / Spotted nutcracker (Nucifraga caryocatactes) Pennine Alps, Wallis, Switzerland. February.

Eric Dragesco / Spotted nutcracker (Nucifraga caryocatactes) Pennine Alps, Wallis, Switzerland. Small repro only.

Eric Dragesco / Spotted nutcracker (Nucifraga caryocatactes) flying carrying nut. Pennine Alps, Wallis, Switzerland. Small repro only.

Eric Dragesco / Spotted nutcracker (Nucifraga caryocatactes) flying carrying nut, Pennine Alps, Wallis, Switzerland. Small repro only.

Eric Dragesco / Spotted nutcracker (Nucifraga caryocatactes) flying carrying nut, Pennine Alps, Wallis, Switzerland. Small repro only.