Niall Benvie,Niall Benvie / Stratus and cirrus clouds above the Isle of Coll. Scotland, August 2012.

Aflo / Y-6504 Cirrus clouds in blue sky above mountain range, North America

Yva Momatiuk & John Eastcott / Cirrus and cumulus clouds over mesa, Monument Valley Navajo Tribal Park, Arizona

Ashley Cooper / Jet stream winds blowing clouds with parhelion, over the Annapurna Himalayas, Nepal. December 2012

Graham Eaton / Cirrus Clouds over the Berwyn Mountains, Llanrhaeadr-ym-Mochnant, Powys, Wales, UK. August 2017.

Pascal Tordeux / Cirrus cloud over small Larch (Larix sp), Cirque de Morgon, Hautes-Alpes, France, August 2014.

Pascal Tordeux / Cirrus clouds over small Larch (Larix sp), Cirque de Morgon, Hautes-Alpes, France, August 2014.

Yva Momatiuk & John Eastcott / Quaking Aspen (Populus tremuloides) trees in autumn, Rocky Mountains, Colorado

Yva Momatiuk & John Eastcott / Cirrus cloud, Utah

Yva Momatiuk & John Eastcott / Quaking Aspen (Populus tremuloides) trees in autumn, San Juan National Forest, Rocky Mountains, Colorado

Niall Benvie / Cirrus clouds displaying wind shear, Brechin, Scotland, UK, September.

Niall Benvie / Cirrus clouds displaying wind shear, Brechin, Scotland, UK, September.