Kirkendall-Spring / View over the Campbell Lakes with stormy clouds at dusk, viewed from Walker Valley Overlook in Hart Mountain National Antelope Refuge, Oregon, USA, May 2013.
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Wild Wonders of Europe / Hermansen / Hart's tongue fern (Asplenium scolopendrium) growing between rocks, Burren National Park, County Clare, Republic of Ireland, June 2009
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Wild Wonders of Europe / Möllers / Hart's tongue fern (Asplenium scolopendrium) San Marino, May 2009
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Gary K. Smith / Hart's Tongue Fern (Asplenium scolopendrium) and Maidenhair spleenwort (Asplenium trichomanes) growing on wall. Northumberland, England, UK, September.
Mike Read / Hartstongue fern (Phyllitis scolopendrium) growing in grykes, Southerscales Scar Yorkshire Wildlife Trust Reserve, near Chapel-le-Dale, Yorkshire Dales National Park, Yorkshire, England, UK, July.
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Mike Read / Hartstongue fern (Phyllitis scolopendrium) growing in grykes, Southerscales Scar Yorkshire Wildlife Trust Reserve, near Chapel-le-Dale, Yorkshire Dales National Park, Yorkshire, England, UK, July.
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Ross Hoddinott / RF - Harts tongue fern (Phyllitis scolopendrium) leaf unfurling and creating the shape of a heart, Cornwall, UK, May.
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Alex Hyde / Hart's tongue fern (Asplenium scolopendrium) growing in limestone pavement gryke, Gait Barrows National Nature Reserve, Lancashire, UK. September.
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Alex Hyde / Hart's tongue fern (Asplenium scolopendrium) growing in limestone pavement gryke, Gait Barrows National Nature Reserve, Lancashire, UK. September.
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Alex Hyde / Hart's tongue fern (Asplenium scolopendrium) growing in limestone pavement, Gait Barrows National Nature Reserve, Lancashire, UK. September.
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Alex Hyde / Hart's tongue fern (Asplenium scolopendrium) growing in limestone pavement, Gait Barrows National Nature Reserve, Lancashire, UK. September.
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Alex Hyde / Hart's tongue fern (Asplenium scolopendrium) growing in limestone pavement. Rows of spore-producing sori can be seen on the underside of the fronds. Gait Barrows National Nature Reserve, Lancashire...
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Alex Hyde / Hart's tongue fern (Asplenium scolopendrium) rows of spore-producing sori on underside of the frond. Gait Barrows National Nature Reserve, Lancashire, UK. September.
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Alex Hyde / Hart's tongue fern (Asplenium scolopendrium) rows of spore-producing sori on underside of the frond. Gait Barrows National Nature Reserve, Lancashire, UK. September.
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Philippe Clement / Hart's-tongue fern (Asplenium scolopendrium) La Brenne, France, June.
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Philippe Clement / Hart's-tongue fern (Asplenium scolopendrium) La Brenne, France, June.
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Philippe Clement / Hart's-tongue fern (Asplenium scolopendrium) La Brenne, France, June.
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Philippe Clement / Hart's-tongue fern (Asplenium scolopendrium) La Brenne, France, June.
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Andy Trowbridge / MacKinnon Pass, the highest point of the Milford track, Mount Hart (1769m) reflected in an alpine tarn, Milford Track, Fiordland National Park, Southland, South Island, New Zealand. November.
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Nick Upton / Clump of Hart's-tongue fern (Phyllitis / Asplenium scolopendrium) in woodland understorey after recent rain, Cornwall, UK, May.
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Nick Upton / Clump of Hart's-tongue fern (Phyllitis / Asplenium scolopendrium) in woodland understorey after recent rain, Cornwall, UK, May.
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Nick Upton / Green-winged orchid (Orchis / Anacamptis morio) flowering in a traditional hay meadow meadow, Wiltshire UK, May.
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Chris Mattison / Hart's Tongue Fern (Asplenium scolopendrium) growing on limestone pavement, Gait Barrows, Lancashire, England, UK, July.
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Chris Mattison / Hart's tongue fern (Asplenium scolopendrium), new fronds emerging from crevice in limestone pavement, Lancashire, UK. April.
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Chris Mattison / Hart's tongue fern (Asplenium scolopendrium), new fronds emerging from crevice in limestone pavement, Lancashire, UK. April.
Kirkendall-Spring / Petroglyph at Petroglyph Lake in Hart Mountain National Antelope Refuge, Oregon, May 2013.
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Tim Fitzharris / Pine River, Hart Ranges, British Columbia, Canada
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Yva Momatiuk & John Eastcott / Cumulus clouds over prairie, Hart Mountain National Wildlife Refuge, Oregon
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Philippe Clement / Hart's Tongue fern (Asplenium scolopendrium) fronds unfurling in spring, Luxembourg, Europe.
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Alan Watson / Yew tree (Taxus baccata) and Hart's tongue ferns (Phyllitis scolopendrium) in temperate forest, Killarney National Park, County Kerry, Republic of Ireland. Europe
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Wild Wonders of Europe / Hermansen / Hart's tongue fern (Asplenium scolopendrium) growing between rocks, Burren National Park, County Clare, Republic of Ireland, June.
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Steven Kazlowski / Cascade golden-mantled ground squirrel (Spermophilus saturatus) on rock, Hart's Pass, North Cascades National Park, Cascades Mountains, Washington, Summer
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Steven Kazlowski / Cascade golden-mantled ground squirrel (Spermophilus saturatus) carrying food along a path, Hart's Pass, North Cascades National Park, Cascades Mountains, Washington
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David Kjaer / Hart's tongue fern {Asplenium scolopendrium} growing in woodland, Somerset, UK
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Tim Fitzharris / Hart River flowing over tundra beneath the Ogilvie Mountains, Yukon Territory, Canada
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Michael Durham / Pronghorn Antelope (Antilocapra americana) male on grassland, Hart Mountain National Wildlife Refuge, Oregon
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Michael Durham / Pronghorn Antelope (Antilocapra americana) male and female on grassland at sunrise, Hart Mountain National Wildlife Refuge, Oregon
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Michael Durham / Pronghorn Antelope (Antilocapra americana) male on grassland at sunrise, Hart Mountain National Wildlife Refuge, Oregon
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Jason Smalley / Hart's tongue fern {Asplenium scolopendrium} England
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Martin Gabriel / Hart's tongue fern, detail of frond with spores {Asplenium scolopendrium} Germany
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Michael Durham / Male Pronghorn antelope running {Antilocapra americana} Hart mtn NWR, Oregon, USA. The proghorn has a maximum speed of 55mph but can also cruise at 40mph for as long as 30 minutes; the animal equivale...
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Michael Durham / Pronghorn antelope pair {Antilocapra americana} Hart mtn NWR, Oregon, USA
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Michael Durham / Pronghorn antelope pair {Antilocapra americana} Hart mtn NWR, Oregon, USA
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Michael Durham / Two Pronghorn antelope females {Antilocapra americana} Hart mtn NWR, Oregon, USA
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Michael Durham / Two Pronghorn antelope females {Antilocapra americana} Hart mtn NWR, Oregon, USA
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Michael Durham / Pronghorn antelope calf {Antilocapra americana} Hart mtn NWR, Oregon, USA
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Michael Durham / Silhouette of Pronghorn antelope at sunset {Antilocapra americana} Oregon, USA Hart Mountain
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Michael Durham / Pronghorn antelope calf + mother {Antilocapra americana} Hart mtn NWR, Oregon, USA
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Paul D Stewart / Portrait of Georges-Louis Leclerc, Comte de Buffon. French naturalist (7 September 1707 - 16th April 1788). Steel engraving 1833 by Robert Hart with later colouring, from the painting by F.H. Drouais...
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Yva Momatiuk & John Eastcott / Juniper (Juniperus sp) in prairie with cumulus clouds above, Hart Mountain National Wildlife Refuge, Oregon
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Jabruson / John Hart radio-tracking Okapi {Okapia johnstoni} research former Zaire now DR of Congo
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Ross Hoddinott / Small pearl-bordered fritillary butterfly (Boloria selene) roosting on Harts tongue fern (Asplenium scolopendrium), Marsland Mouth, Cornwall, UK, May 2023.
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Jiri Lochman / Club wasp (Sphex cognatus) female, excavating an underground nest chamber in sandy soil, Mount Hart Station, Kimberley, Western Australia.
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Ashley Cooper / Harts tongue fern (Asplenium scolopendrium) growing in the crevices of limestone pavement, Ingleborough, Yorkshire Dales, UK. August.
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Chris Mattison / Hart's tongue tern (Asplenium scolopendrium) growing on limestone pavement. Gait Barrows National Nature Reserve, Cumbria, UK. May.
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Colin Varndell / Hart's tongue fern (Asplenium scolopendrium) unfurling fronds in spring, Dorset, UK. May.
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Jiri Lochman / Golden-backed tree-rat (Mesembriomys macrurus) sitting on branch feeding on native figs, Mount Hart Station, Western Australia.
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Jiri Lochman / Golden-backed tree-rat (Mesembriomys macrurus) sitting on branch feeding on native figs, Mount Hart Station, Western Australia.
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Jiri Lochman / Golden-backed tree-rat (Mesembriomys macrurus) moving along tree branch, Mount Hart Station, Western Australia.
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Jiri Lochman / Golden-backed tree-rat (Mesembriomys macrurus) sitting on tree branch, feeding, Mount Hart Station, Western Australia.
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John Waters / Unfurling 'fiddleheads' of Hart's-tongue Fern (Asplenium scolopendrium), deciduous woodland near Bristol, UK, May.
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Will Watson / Hart's-tongue Fern (Asplenium scolopendrium), ancient woodland, Herefordshire, England, December, focus stacked.
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Nigel Cattlin / Hart's tongue fern (Asplenium scolopendrium) with leaves unfurling in spring, Devon, May
