Jack Dykinga / Leafless Cottonwood trees (Populus sp.) and cattails reflected in the water at dawn, Whitewater Draw, Arizona State Game and Fish Reserve, USA. January 2020.

Jack Dykinga / Morning light with autumn coloured Cottonwoods (Populus sp) trees lining the river. Valley of the Gods, Colorado Plateau, of the Great Basin Desert, Utah, USA, November 2018.

Pascal Tordeux / Avenue of Poplar (Populus sp) trees in fog, Villers Le Sec, Aisne, Picardy, France, December.

Pascal Tordeux,Pascal Tordeux / Two rows of Poplar (Populus sp.) trees reflected in in flood water, during the floods of the River Oise, Picardy, France, January 2008

Pascal Tordeux / A row of Poplar trees (Populus sp) with Mistletoe (Viscum sp) silhouetted in winter at sunset, Picardy, France, January

Jeff Foott / Cottonwood (Populus sp) trees in autumn, Grand Staircase-Escalante National Monument, Utah

Jeff Foott / Fremont Cottonwood (Populus fremontii) trees in autumn, Bentonite Hills, Capitol Reef National Park, Utah

Tim Fitzharris / Cottonwood (Populus sp) trees in autumn, Teec Nos Pos, Arizona

Jack Dykinga / Cottonwood trees (Populus sp) at the pond's edge reflected in bright dawn light. Bosque del Apache National Wildlife Refuge, New Mexico, USA. December.

Nigel Cattlin / Poplar rust (Melampsora sp) disease pustules on underside of White poplar (Populus alba) leaf.

David Pattyn / Fishpond landscape with Poplar (Populus sp.) at the edge in autmn colors. Valkenhorst Nature Reserve, Valkenswaard, The Netherlands, October.

Jack Dykinga / Leafless Cottonwood trees (Populus sp.) and cattails reflected in the water at sunset, Whitewater Draw, Arizona State Game and Fish Reserve, USA. January 2020.

Jack Dykinga / Leafless Cottonwood trees (Populus sp.) and cattails reflected in the water at sunset, Whitewater Draw, Arizona State Game and Fish Reserve, USA. January 2020.

Jack Dykinga / Cottonwood (Populus sp) trees and Sagebrush (Artemisia sp), Long Canyon at the confluence with The Gulch. Grand Staircase-Escalante National Monument, Utah, USA. October.

Jack Dykinga / Sycamore (Acer sp) and Cottonwood (Populus sp) trees lining dry creek bed, rhyolite cliffs above. Cave Creek Canyon, Chiricahua Mountains, Coronado National Forest, Arizona, USA. November 2019.

John Shaw / Cottonwood trees (Populus sp) in autumn color and weathered granite boulders, in the Alabama Hills, California, USA, November.

Andres M. Dominguez / Grey-headed woodpecker (Picus canus) feeding at holes in Populus sp tree , Danube Delta, Romania. July.

Andres M. Dominguez / Grey-headed woodpecker (Picus canus) feeding at holes in Populus sp tree , Danube Delta, Romania. July.

Nigel Cattlin / Poplar hawk moth (Laothoe populi) resting on Poplar (Populus sp) leaf. Devon, England, UK. May.

Jack Dykinga / San Pedro River lined with Cottonwood (Populus sp) trees, in evening light. San Pedro Riparian National Conservation Area, Arizona, USA. June 2019..

Jack Dykinga / Morning light with autumn coloured Cottonwoods (Populus sp) trees lining the river. Valley of the Gods, Colorado Plateau, of the Great Basin Desert, Utah, USA, November 2018.

Nick Upton / Lisaku Park Forest from above, a mix of mature Fir (Abies sp) trees, Birch (Betula sp) and Eurasian aspen (Populus tremula). Forest host to Siberian flying squirrel (Pteromys volans). Estonia, April 2...

Nick Upton / Lisaku Park Forest from above, a mix of mature Fir (Abies sp) trees, Birch (Betula sp) and Eurasian aspen (Populus tremula). Forest host to Siberian flying squirrel (Pteromys volans). Estonia, April 2...

Andres M. Dominguez / Autumn colours of Poplar (Populus sp) Ordesa y Monte Perdido National Park, Spain. October.

Michel Roggo / Gallery forest along the channels dominated by mainly Willows (Salix sp.) and Poplars (Populus sp.) Danube Delta Biosphere Reserve, Danube Delta, Romania May 2015. Photographed for The Freshwater Pro...

Cyril Ruoso / Frosty meadow with yellow leaves of Poplar (Populus sp) Lot, France, December 2016.

Cyril Ruoso / Frosty meadow with yellow leaves of Poplar (Populus sp) Lot, France, December 2016.

Cyril Ruoso / Frosty meadow with yellow leaves of Poplar (Populus sp) Lot, France, December 2016.

Cyril Ruoso / Frosty meadow with yellow leaves of Poplar (Populus sp) Lot, France, December 2016.

Will Watson / Dead Ivy (Hedera helix) on Poplar (Poplus sp.) tree, The Weir Garden, National Trust, Kenchester, Hereforshire, England, UK, October

Pascal Tordeux / Poplar trees (Populus sp) in spring with clouds behind, Surfontaine, Picardy, France, March.

Andres M. Dominguez / Poplar trees (Populus sp) in autumn, Sierra de Grazalema Natural Park, southern Spain, October.

Pascal Tordeux / Poplar (Populus sp) tees along road, Montreuil, Pas De Calais, France, September 2015.

Pascal Tordeux / Poplar trees (Populus sp), Zoteux, Pas De Calais, France, August 2015.

Martin Gabriel / Poplar tree (Populus sp) trunk with bark growing over base of two branches that have been cut, Po Delta, Italy, November.

Jack Dykinga / Cottonwood trees (Populus sp) in autumn with curved boughs with understorey of Rabbitbrush (Chrysothamnus) Long Canyon, Grand Staircase-Escalante National Monument, Utah, USA, October.

Jouan Rius / Patriarchs Summits with Cottonwood trees (Populus sp) Zion National Park, Utah, USA November 2012

Philippe Clement / Mistletoe (Viscum album) in Poplar trees (Populus sp) La Brenne, France

Philippe Clement / Mistletoe (Viscum album) in Poplar tree (Populus sp) La Brenne, France

Philippe Clement / Mistletoe (Viscum album) in Poplar tree (Populus sp) tree. La Brenne, France

Philippe Clement / Mistletoe (Viscum album) in Poplar tree (Populus sp) La Brenne, France

Philippe Clement / Mistletoe (Viscum album) in Poplar trees (Populus sp) La Brenne, France 2007

Michael Durham / Cottonwood (Populus sp) hybrid tree farm grown for pulp and fiber, primarily for paper production, Washington

Michael Durham / Cottonwood (Populus sp) hybrid tree farm grown for pulp and fiber, primarily for paper production, Washington

Cyril Ruoso / Cottonwood (Populus sp) plantation, France

Cyril Ruoso / Cottonwood (Populus sp) plantation, France

Matthias Breiter / Quaking Aspen (Populus tremuloides) and Birch (Betula sp) trees in winter, Manley Hot Springs, Alaska

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