John Shaw / Poplar (Populus sp.) tree plantation, hybrid species, in autumn, Boardman Tree Farm, near Irrigon, Oregon, USA. October.
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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.
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Jeff Foott / Cottonwood (Populus sp) trees in autumn, Grand Staircase-Escalante National Monument, Utah
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Jeff Foott / Fremont Cottonwood (Populus fremontii) trees in autumn, Bentonite Hills, Capitol Reef National Park, Utah
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Pascal Tordeux / Avenue of Poplar (Populus sp) trees in fog, Villers Le Sec, Aisne, Picardy, France, December.
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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
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Pascal Tordeux / A row of Poplar trees (Populus sp) with Mistletoe (Viscum sp) silhouetted in winter at sunset, Picardy, France, January
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Tim Fitzharris / Cottonwood (Populus sp) trees in autumn, Teec Nos Pos, Arizona
Jack Dykinga / San Pedro River lined with Cottonwood (Populus sp) trees, in evening light. San Pedro Riparian National Conservation Area, Arizona, USA. June 2019..
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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.
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Jeff Foott / Fremont Cottonwood (Populus fremontii) trees and potholes in autumn, Grand Staircase-Escalante National Monument, Utah
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Jeff Foott / Fremont Cottonwood (Populus fremontii) trees in autumn, Grand Staircase-Escalante National Monument, Utah
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Jeff Foott / Fremont Cottonwood (Populus fremontii) trees in autumn, Grand Staircase-Escalante National Monument, Utah
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Jeff Foott / Fremont Cottonwood (Populus fremontii) trees in autumn, Grand Staircase-Escalante National Monument, Utah
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Jeff Foott / Fremont Cottonwood (Populus fremontii) trees in autumn, Grand Staircase-Escalante National Monument, Utah
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Jeff Foott / Cottonwood (Populus sp) trees in riverine dip in autumn, Grand Staircase-Escalante National Monument, Utah
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Jeff Foott / Fremont Cottonwood (Populus fremontii) trees in autumn with potholes, Grand Staircase-Escalante National Monument, Utah
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Jeff Foott / Fremont Cottonwood (Populus fremontii) trees in riverine dip in autumn, Deer Creek Canyon, Grand Staircase-Escalante National Monument, Utah
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Jeff Foott / Cottonwood (Populus sp) trees in autumn, Glacier National Park, Montana
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Jeff Foott / Fremont Cottonwood (Populus fremontii) trees in autumn, Bentonite Hills, Capitol Reef National Park, Utah
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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...
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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...
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Chase Dekker / Cottonwood (Populus sp) trees in autumn near mountains, Grand Teton National Park, Wyoming
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Andres M. Dominguez / Autumn colours of Poplar (Populus sp) Ordesa y Monte Perdido National Park, Spain. October.
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Suzi Eszterhas / American Beaver (Castor canadensis) mother and eight-week-old kit feeding on Cottonwood (Populus sp), Martinez, California
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Suzi Eszterhas / American Beaver (Castor canadensis) mother and eight-week-old kit feeding on Cottonwood (Populus sp), Martinez, California
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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...
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Jeff Foott / Cottonwood (Populus sp) tree in hole, Grand Staircase-Escalante National Monument, Utah
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Jeff Foott / American Beaver (Castor canadensis) feeding on Quaking Aspen (Populus tremuloides), Grand Teton National Park, Wyoming
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Jeff Foott / American Beaver (Castor canadensis) feeding on Quaking Aspen (Populus tremuloides), Grand Teton National Park, Wyoming
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Jeff Foott / American Beaver (Castor canadensis) feeding on Quaking Aspen (Populus tremuloides), Grand Teton National Park, Wyoming
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Cyril Ruoso / Frosty meadow with yellow leaves of Poplar (Populus sp) Lot, France, December 2016.
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Cyril Ruoso / Frosty meadow with yellow leaves of Poplar (Populus sp) Lot, France, December 2016.
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Cyril Ruoso / Frosty meadow with yellow leaves of Poplar (Populus sp) Lot, France, December 2016.
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Cyril Ruoso / Frosty meadow with yellow leaves of Poplar (Populus sp) Lot, France, December 2016.
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Will Watson / Dead Ivy (Hedera helix) on Poplar (Poplus sp.) tree, The Weir Garden, National Trust, Kenchester, Hereforshire, England, UK, October
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Tim Fitzharris / Rubber Rabbitbrush (Chrysothamnus nauseosus) blooming near Cottonwood (Populus sp) trees in sand dunes in winter, Mount Herard, Great Sand Dunes National Park, Colorado
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Tim Fitzharris / Rubber Rabbitbrush (Chrysothamnus nauseosus) blooming near Cottonwood (Populus sp) trees in sand dunes in winter, Mount Herard, Great Sand Dunes National Park, Colorado
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Tim Fitzharris / Cottonwood (Populus sp) trees in winter, Mount Herard, Great Sand Dunes National Park, Colorado
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Tim Fitzharris / Cottonwood (Populus sp) trees in winter, Mount Herard, Great Sand Dunes National Park, Colorado
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Tim Fitzharris / Quaking Aspen (Populus tremuloides) and Ponderosa Pine (Pinus ponderosa) trees in winter, Santa Fe National Forest, New Mexico
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Tim Fitzharris / Quaking Aspen (Populus tremuloides) and Ponderosa Pine (Pinus ponderosa) trees in winter, Santa Fe National Forest, New Mexico
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Tim Fitzharris / Cottonwood (Populus sp) trees along the Rio Grande in autumn, Wild Rivers Recreation Area, New Mexico
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Tim Fitzharris / Rubber Rabbitbrush (Chrysothamnus nauseosus) and Cottonwood (Populus sp) trees in autumn, Santa Fe National Forest, New Mexico
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Pascal Tordeux / Poplar trees (Populus sp) in spring with clouds behind, Surfontaine, Picardy, France, March.
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Jeff Foott / Quaking Aspen (Populus tremuloides) and fir tree in fall, Grand Staircase-Escalante National Monument, Utah
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Jeff Foott / Cottonwood (Populus sp) tree in winter, Zion National Park, Utah
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Andres M. Dominguez / Poplar trees (Populus sp) in autumn, Sierra de Grazalema Natural Park, southern Spain, October.
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Pascal Tordeux / Poplar trees (Populus sp), Zoteux, Pas De Calais, France, August 2015.
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Pascal Tordeux / Poplar (Populus sp) tees along road, Montreuil, Pas De Calais, France, September 2015.
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Tim Fitzharris / Fremont Cottonwood (Populus fremontii) tree, White Sands National Park, New Mexico
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Tim Fitzharris / Fremont Cottonwood (Populus fremontii) tree, White Sands National Park, New Mexico
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Colin Monteath / Cottonwood (Populus sp) trees in autumn, Arrowtown, Otago, New Zealand
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Martin Gabriel / Poplar tree (Populus sp) trunk with bark growing over base of two branches that have been cut, Po Delta, Italy, November.
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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.
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Donald M. Jones / Western Screech Owl (Megascops kennicottii) in Cottonwood (Populus sp) tree cavity, Montana
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Donald M. Jones / Rocky Mountain Elk (Cervus canadensis nelsoni) bull rubbing against Aspen (Populus sp) tree, Canada
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Donald M. Jones / Rocky Mountain Elk (Cervus canadensis nelsoni) female standing on hind legs feeding on Aspen (Populus sp) leaves, Canada
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Donald M. Jones / Rocky Mountain Elk (Cervus canadensis nelsoni) female feeding on Aspen (Populus sp) leaves, Montana
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Donald M. Jones / Black Bear (Ursus americanus) cub in Aspen (Populus sp) tree, Canada
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Mark Raycroft / Black Bear (Ursus americanus) feeding on catkins in Aspen (Populus sp) tree, North America
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Jouan Rius / Patriarchs Summits with Cottonwood trees (Populus sp) Zion National Park, Utah, USA November 2012
Cyril Ruoso / Cottonwood (Populus sp) plantation, France
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Cyril Ruoso / Cottonwood (Populus sp) plantation, France
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Tim Fitzharris / Cottonwood (Populus sp) trees in autumn, Carson Valley, Nevada
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Tim Fitzharris / Cottonwood (Populus sp) trees in autumn near Maroon Bells, Colorado
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Jim Brandenburg / Cottonwood (Populus sp) tree in prairie
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Donald M. Jones / Elk (Cervus elaphus) antler scrape on Cottonwood (Populus sp) trunk, Jasper National Park, Alberta, Canada
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Donald M. Jones / Elk (Cervus elaphus) antler scrape on Cottonwood (Populus sp) trunk, Jasper National Park, Alberta, Canada
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Colin Monteath / Willow (Salix sp) and Cottonwood (Populus sp) trees in fall colors with Lake Pukaki and Mount Cook, Mackenzie Country, South Canterbury, New Zealand
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Yva Momatiuk & John Eastcott / Maple (Acer sp) and Cottonwood (Populus sp) trees in fall colors, Zion National Park, Utah
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Matthias Breiter / Cottonwood (Populus sp) trees with new leaves, Stikine River, Alaska
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Donald M. Jones / Great Horned Owl (Bubo virginianus) in cottonwood tree, western Montana
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Donald M. Jones / American Beaver (Castor canadensis) carrying cottonwood branches over dam, western Montana
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Donald M. Jones / American Beaver (Castor canadensis) eating cottonwood leaf, western Montana
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Tim Fitzharris / Cooper's Hawk (Accipiter cooperii) flying over Quaking Aspen (Populus tremuloides) forest, Santa Fe National Forest, Sangre de Cristo Mountains, New Mexico
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Donald M. Jones / Eastern Fox Squirrel (Sciurus niger) on Cottonwood (Populus sp) tree, central Montana
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Donald M. Jones / Eastern Fox Squirrel (Sciurus niger) on Cottonwood (Populus sp) tree, central Montana
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Donald M. Jones / American Elk (Cervus elaphus nelsoni) bull eating Quaking Aspen (Populus tremuloides) bark in winter, western Montana
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Donald M. Jones / American Elk (Cervus elaphus nelsoni) chew marks on bark of Quaking Aspen (Populus tremuloides), western Montana
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Donald M. Jones / American Elk (Cervus elaphus nelsoni) bull bedded in background and elk chews on Quaking Aspen (Populus tremuloides) bark in foreground, western Montana
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Donald M. Jones / American Elk (Cervus elaphus nelsoni) chew marks on bark of Quaking Aspen (Populus tremuloides), western Montana
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Yva Momatiuk & John Eastcott / Quaking Aspen (Populus tremuloides) tree trunk with elk antler rubs, Grand Teton National Park, Wyoming
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Tim Fitzharris / Quaking Aspen (Populus tremuloides) and Spruce (Picea sp) dusted with fresh snow, Rocky Mountain National Park, Colorado
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Tim Fitzharris / Quaking Aspen (Populus tremuloides) trees and Fireweed (Chamerion angustifolium), Collegiate Peaks Wilderness Area, Colorado
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Michael Durham / Cottonwood (Populus sp) hybrid tree farm grown for pulp and fiber, primarily for paper production, Washington
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Michael Durham / Cottonwood (Populus sp) hybrid tree farm grown for pulp and fiber, primarily for paper production, Washington
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Yva Momatiuk & John Eastcott / Black Spruce (Picea mariana) at their northern most range in tundra in fall colors, mountain stream rushing down among boulders, and high rocky peaks in first snow, Brooks Range, arctic Alaska
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Tim Fitzharris / Cottonwood (Populus sp) frozen leaves, North America
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Tim Fitzharris / Cottonwood (Populus sp) frozen leaves, North America
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Philippe Clement / Mistletoe (Viscum album) in Poplar tree (Populus sp) tree. La Brenne, France
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Philippe Clement / Mistletoe (Viscum album) in Poplar tree (Populus sp) La Brenne, France
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Philippe Clement / Mistletoe (Viscum album) in Poplar trees (Populus sp) La Brenne, France 2007
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Philippe Clement / Mistletoe (Viscum album) in Poplar trees (Populus sp) La Brenne, France