Jack Dykinga / Rainbow over Long Canyon with fall coloured Cottonwood (Populus) trees against canyon walls, Burr Trail, Grand Staircase-Escalante National Monument, Utah, USA, October 2018.
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Nick Hawkins / Chum salmon (Oncorhynchus keta) migrate up a small river near Bella Bella, British Columbia, Canada. September
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Marie Read / Wood Ducks (Aix sponsa), females behave aggressively toward a male (second from right) that is trying to join them on a floating log, autumn, New York, USA, October.
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Marie Read / Snow buntings (Plectrophenax nivalis) flock in flight during a snowstorm, New York, USA, January.
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Marie Read / Blue jay (Cyanocitta cristata) holding an acorn in its bill whilst perched on tree stump, with autumn foliage, New York, USA, October.
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Jeff Foott / Cottonwood (Populus sp) trees in autumn, Grand Staircase-Escalante National Monument, Utah
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Jeff Foott / Mountains and river after autumn snowfall, Sunwapta River, Jasper National Park, Alberta, Canada
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Jeff Foott / Mixed coniferous and deciduous forest after snowfall in autumn, Wells Gray Provincial Park, British Columbia, Canada
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Jeff Foott / Waterfall after autumn snowfall, Tangle Creek Falls, Jasper National Park, Alberta, Canada
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Jeff Foott / Waterfall after autumn snowfall, Tangle Creek Falls, Jasper National Park, Alberta, Canada
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Jeff Foott / Fremont Cottonwood (Populus fremontii) trees in autumn, Bentonite Hills, Capitol Reef National Park, Utah
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Jeff Foott / Hiker near waterfall and rainbow, Nevada Fall, Yosemite National Park, California
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Jan Wegener / Lewin's Honeyeater (Meliphaga lewinii), Victoria, Australia
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Oriol Alamany / Lewin's Honeyeater (Meliphaga lewinii) perched, rainforest of the Green Mountains, Lamington National Park, Rainforests of Australia UNESCO World Heritage Site, Queensland, Australia
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Greg Oakley / Lewin's Honeyeater (Meliphaga lewinii), Queensland, Australia
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Rob Drummond / Lewin's Honeyeater (Meliphaga lewinii), Queensland, Australia
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Jan Wegener / Lewin's Honeyeater (Meliphaga lewinii), Queensland, Australia
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Jan Wegener / Lewin's Honeyeater (Meliphaga lewinii), Queensland, Australia
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Rob Drummond / Lewin's Honeyeater (Meliphaga lewinii), New South Wales, Australia
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Rod Williams / Lewin's Honeyeater (Meliphaga lewinii) perched, Lamington National Park, SE Queensland, Australia, March
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Tim Laman / Lewin honeyeater (Meliphaga lewinii) on branch, Queensland, Australia
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Jouan & Rius / Lewin's honeyeater (Meliphaga Lewinii) on branch, Queensland, Australia
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Steven David Miller / Lewin honeyeater {Meliphaga lewinii} Lamington, Queensland, Australia
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Kevin Schafer / Lewin's Honeyeater (Meliphaga lewinii) feeding on Grevillea (Grevillea sp) flower nectar, Lamington National Park, Queensland, Australia