Cyril Ruoso / Puya flowers (Puya sp) Cordillera Blanca Massif, Andes, Peru.

Cyril Ruoso / Northern viscacha (Lagidium peruanum) adult and young Cordillera Blanca Massif, Andes, Peru.

Cyril Ruoso / Queen of the Andes (Puya raymondii) Cordillera Blanca Massif, Andes, Peru, November.

Cyril Ruoso / Giant humming bird (Patagona gigas) feeding from Queen of the Andes (Puya raymondii) flowers, Cordillera Blanca Massif, Andes, Peru, November.

Cyril Ruoso / Chacraraju Mountain summit at 6112 meters, Cordillera Blanca Mountain Range, Andes, Peru

Cyril Ruoso / Blue-and-black Tanager (Tangara vassorii) at 4500 meters, Cordillera Blanca Mountain Range, Andes, Peru

Cyril Ruoso / Glacier cave with icicles, Pastoruri Glacier 5200m above sea level, Cordillera Blanca, Andes, Peru

Cyril Ruoso / Clouds above the Chacraraju Mountain (summit at 6112), Cordillera Blanca Mountain Range, Huscaran National Park, Andes, Peru

Cyril Ruoso / Avalanche rolling down mountain, Llaca glacier surrounding Cordillera Blanca Mountain Range, Andes, Huscaran National Park, Peru

Cyril Ruoso / Cordillera Blanca Mountain Range at dusk, Huscaran National Park, Andes, Peru

Cyril Ruoso / Cordillera Blanca Mountain Range at dusk, Huscaran National Park, Andes, Peru

Cyril Ruoso / Cordillera Blanca Mountain Range, Huscaran National Park, Andes, Peru