• Results for
    • Pacifastacus Leniusculus
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View of the River Till, part of area where The Tweed Foundation are monitoring the population and spread of Signal Crayfish (Pacifastacus leniusculus), Northumberland, England, UK, October  -  Rob Jordan / 2020VISION
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Rob Jordan / 2020VISION / View of the River Till, part of area where The Tweed Foundation are monitoring the population and spread of Signal Crayfish (Pacifastacus leniusculus), Northumberland, England, UK, October
Signal crayfish (Pacifastacus leniusculus) in a defensive posture after being caught by The Tweed Foundation monitoring the species population and spread on the River Till, Northumberland, England, UK...  -  Rob Jordan / 2020VISION
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Rob Jordan / 2020VISION / Signal crayfish (Pacifastacus leniusculus) in a defensive posture after being caught by The Tweed Foundation monitoring the species population and spread on the River Till, Northumberland, England, UK...
Signal crayfish (Pacifastacus leniusculus) in a defensive posture after being caught by The Tweed Foundation monitoring the species population and spread on the River Till, Northumberland, England, UK...  -  Rob Jordan / 2020VISION
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Rob Jordan / 2020VISION / Signal crayfish (Pacifastacus leniusculus) in a defensive posture after being caught by The Tweed Foundation monitoring the species population and spread on the River Till, Northumberland, England, UK...
Signal Crayfish {Pacifastacus leniusculus} Leicestershire, UK  -  Paul Hobson
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Paul Hobson / Signal Crayfish {Pacifastacus leniusculus} Leicestershire, UK
Signal crayfish (Pacifastacus leniusculus) Europe, introduced from North America  -  Michel Roggo
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Michel Roggo / Signal crayfish (Pacifastacus leniusculus) Europe, introduced from North America
Signal Crayfish (Pacifastacus leniusculus) defence posture in chalk stream, Hertfordshire, UK  -  Andy Sands
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Andy Sands / Signal Crayfish (Pacifastacus leniusculus) defence posture in chalk stream, Hertfordshire, UK
Signal crayfish (Pacifastacus leniusculus), fighting for burrow built in the soft limestone lake bed, Lake Neuchatel, Switzerland, October. Photographed for The Freshwater Project.  -  Michel Roggo
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Michel Roggo / Signal crayfish (Pacifastacus leniusculus), fighting for burrow built in the soft limestone lake bed, Lake Neuchatel, Switzerland, October. Photographed for The Freshwater Project.
Signal crayfish (Pacifastacus leniusculus),  Lake of Neuchatel, Switzerland, October. Photographed for The Freshwater Project.  -  Michel Roggo
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Michel Roggo / Signal crayfish (Pacifastacus leniusculus), Lake of Neuchatel, Switzerland, October. Photographed for The Freshwater Project.
Signal crayfish (Pacifastacus leniusculus), fighting over burrow dug in soft limestone ground. Lake Neuchatel, close to Boudry, Canton of Neuchatel, Switzerland. October. Photographed for The Freshwat...  -  Michel Roggo
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Michel Roggo / Signal crayfish (Pacifastacus leniusculus), fighting over burrow dug in soft limestone ground. Lake Neuchatel, close to Boudry, Canton of Neuchatel, Switzerland. October. Photographed for The Freshwat...
Signal crayfish (Pacifastacus leniusculus), a North American species of crayfish, introduced to Europe in the 1960s. Lake Neuchatel, close to Boudry, Canton of Neuchatel, Switzerland. October.  Photo...  -  Michel Roggo
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Michel Roggo / Signal crayfish (Pacifastacus leniusculus), a North American species of crayfish, introduced to Europe in the 1960s. Lake Neuchatel, close to Boudry, Canton of Neuchatel, Switzerland. October. Photo...
Signal crayfish (Pacifastacus leniusculus), non-native invasive species. On riverbed in woodland. La Cure river, Morvan, Bourgogne-Franche-Comte, France. May.  -  Cyril Ruoso
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Cyril Ruoso / Signal crayfish (Pacifastacus leniusculus), non-native invasive species. On riverbed in woodland. La Cure river, Morvan, Bourgogne-Franche-Comte, France. May.
Signal crayfish (Pacifastacus leniusculus), non-native invasive species, on riverbed. La Cure river, Morvan, Bourgogne-Franche-Comte, France. May.  -  Cyril Ruoso
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Cyril Ruoso / Signal crayfish (Pacifastacus leniusculus), non-native invasive species, on riverbed. La Cure river, Morvan, Bourgogne-Franche-Comte, France. May.
Signal crayfish (Pacifastacus leniusculus), non-native invasive species, on riverbed in woodland. La Cure river, Morvan, Bourgogne-Franche-Comte, France. May.  -  Cyril Ruoso
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Cyril Ruoso / Signal crayfish (Pacifastacus leniusculus), non-native invasive species, on riverbed in woodland. La Cure river, Morvan, Bourgogne-Franche-Comte, France. May.
Signal crayfish (Pacifastacus leniusculus) on river bed near bridge, split level image. River Rivelin, Sheffield, England, UK. September 2018.  -  Paul Hobson
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Paul Hobson / Signal crayfish (Pacifastacus leniusculus) on river bed near bridge, split level image. River Rivelin, Sheffield, England, UK. September 2018.
Signal crayfish (Pacifastacus leniusculus) displaying aggression with claws up, split level. River Don, Sheffield, England, UK. September 2018.  -  Paul Hobson
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Paul Hobson / Signal crayfish (Pacifastacus leniusculus) displaying aggression with claws up, split level. River Don, Sheffield, England, UK. September 2018.
Signal crayfish (Pacifastacus leniusculus) displaying aggression with claws up. River Don, Sheffield, England, UK. September 2018.  -  Paul Hobson
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Paul Hobson / Signal crayfish (Pacifastacus leniusculus) displaying aggression with claws up. River Don, Sheffield, England, UK. September 2018.
White-clawed crayfish (Austropotamobius pallipes) collected from a well-stocked stream being released at an ARK site stream, safe from Signal crayfish (Pacifastacus leniusculus) and Crayfish plague, E...  -  Nick Upton
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Nick Upton / White-clawed crayfish (Austropotamobius pallipes) collected from a well-stocked stream being released at an ARK site stream, safe from Signal crayfish (Pacifastacus leniusculus) and Crayfish plague, E...
Alan Sumnall of GWT releasing White-clawed crayfish (Austropotamobius pallipes) collected from a well stocked location at at an ARK site stream, safe from Signal crayfish (Pacifastacus leniusculus) an...  -  Nick Upton
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Nick Upton / Alan Sumnall of GWT releasing White-clawed crayfish (Austropotamobius pallipes) collected from a well stocked location at at an ARK site stream, safe from Signal crayfish (Pacifastacus leniusculus) an...
John Field placing White-clawed crayfish (Austropotamobius pallipes) in an inspection tray for sexing and health checks ahead of translocation to an ARK site, safe from Signal crayfish (Pacifastacus l...  -  Nick Upton
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Nick Upton / John Field placing White-clawed crayfish (Austropotamobius pallipes) in an inspection tray for sexing and health checks ahead of translocation to an ARK site, safe from Signal crayfish (Pacifastacus l...
GWT team placing White-clawed crayfish (Austropotamobius pallipes) collected from a well-stocked stream in buckets for release at an ARK site, safe from Signal crayfish (Pacifastacus leniusculus) and...  -  Nick Upton
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Nick Upton / GWT team placing White-clawed crayfish (Austropotamobius pallipes) collected from a well-stocked stream in buckets for release at an ARK site, safe from Signal crayfish (Pacifastacus leniusculus) and...
John Field and a GWT volunteer inspecting White-clawed crayfish (Austropotamobius pallipes) caught in a well-stocked stream to check their size, sex and health ahead of translocation to an ARK site, s...  -  Nick Upton
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Nick Upton / John Field and a GWT volunteer inspecting White-clawed crayfish (Austropotamobius pallipes) caught in a well-stocked stream to check their size, sex and health ahead of translocation to an ARK site, s...
White-clawed crayfish (Austropotamobius pallipes) collected from a well-stocked stream in a bucket ready for release at an ARK site, safe from Signal crayfish (Pacifastacus leniusculus) and Crayfish p...  -  Nick Upton
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Nick Upton / White-clawed crayfish (Austropotamobius pallipes) collected from a well-stocked stream in a bucket ready for release at an ARK site, safe from Signal crayfish (Pacifastacus leniusculus) and Crayfish p...
Emma Settle of GWT disinfecting her boots before helping to release White-clawed crayfish (Austropotamobius pallipes) at an ARK site, safe from Signal crayfish (Pacifastacus leniusculus) and Crayfish...  -  Nick Upton
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Nick Upton / Emma Settle of GWT disinfecting her boots before helping to release White-clawed crayfish (Austropotamobius pallipes) at an ARK site, safe from Signal crayfish (Pacifastacus leniusculus) and Crayfish...
White-clawed crayfish (Austropotamobius pallipes) found in shallow stream by GWT team for translocation to an ARK site, safe from Signal crayfish (Pacifastacus leniusculus) and Crayfish plague, Englan...  -  Nick Upton
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Nick Upton / White-clawed crayfish (Austropotamobius pallipes) found in shallow stream by GWT team for translocation to an ARK site, safe from Signal crayfish (Pacifastacus leniusculus) and Crayfish plague, Englan...
Large White-clawed crayfish (Austropotamobius pallipes) caught in a well stocked stream ahead of translocation to an ARK site, safe from Signal crayfish (Pacifastacus leniusculus) and Crayfish plague,...  -  Nick Upton
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Nick Upton / Large White-clawed crayfish (Austropotamobius pallipes) caught in a well stocked stream ahead of translocation to an ARK site, safe from Signal crayfish (Pacifastacus leniusculus) and Crayfish plague,...
Very small White-clawed crayfish (Austropotamobius pallipes) beside a much larger one caught in a well stocked stream, with the smaller one not large enough for translocation to an ARK site, safe from...  -  Nick Upton
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Nick Upton / Very small White-clawed crayfish (Austropotamobius pallipes) beside a much larger one caught in a well stocked stream, with the smaller one not large enough for translocation to an ARK site, safe from...
Large male White-clawed crayfish (Austropotamobius pallipes) with claspers visible under the tail, caught in a well stocked stream ahead of translocation to an ARK site, safe from Signal crayfish (Pac...  -  Nick Upton
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Nick Upton / Large male White-clawed crayfish (Austropotamobius pallipes) with claspers visible under the tail, caught in a well stocked stream ahead of translocation to an ARK site, safe from Signal crayfish (Pac...
GWT team processing White-clawed crayfish (Austropotamobius pallipes) in a well-stocked stream to check their size, sex and health ahead of translocation to an ARK site, safe from Signal crayfish (Pac...  -  Nick Upton
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Nick Upton / GWT team processing White-clawed crayfish (Austropotamobius pallipes) in a well-stocked stream to check their size, sex and health ahead of translocation to an ARK site, safe from Signal crayfish (Pac...
Richard Spyvee lifting a baited trap set for White-clawed crayfish (Austropotamobius pallipes) under license in a well stocked stream for translocation of healthy Crayfish to an ARK site, safe from Si...  -  Nick Upton
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Nick Upton / Richard Spyvee lifting a baited trap set for White-clawed crayfish (Austropotamobius pallipes) under license in a well stocked stream for translocation of healthy Crayfish to an ARK site, safe from Si...
Richard Spyvee inspects a baited trap that has caught many White-clawed crayfish (Austropotamobius pallipes) under license in a well stocked stream for translocation of healthy Crayfish to an ARK site...  -  Nick Upton
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Nick Upton / Richard Spyvee inspects a baited trap that has caught many White-clawed crayfish (Austropotamobius pallipes) under license in a well stocked stream for translocation of healthy Crayfish to an ARK site...
Scientist measuring a crayfish head and thorax of a non-native Signal Crayfish (Pacifastacus leniusculus), River Lugg SSSI, north Herefordshire, England, UK, August.  -  Will Watson
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Will Watson / Scientist measuring a crayfish head and thorax of a non-native Signal Crayfish (Pacifastacus leniusculus), River Lugg SSSI, north Herefordshire, England, UK, August.
Scientist castrating Signal Crayfish (Pacifastacus leniusculus) during a control programme, River Lugg, SSSI, Herefordshire, England, UK, August 2017.  -  Will Watson
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Will Watson / Scientist castrating Signal Crayfish (Pacifastacus leniusculus) during a control programme, River Lugg, SSSI, Herefordshire, England, UK, August 2017.
Signal crayfish (Pacifastacus leniusculus) in a river. Haute-Savoie, Alps, France, October.  -  Remi Masson
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Remi Masson / Signal crayfish (Pacifastacus leniusculus) in a river. Haute-Savoie, Alps, France, October.
Signal crayfish (Pacifastacus leniusculus) in a river.  Alps, Haute-Savoie, France. October. Invasive species.  -  Remi Masson
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Remi Masson / Signal crayfish (Pacifastacus leniusculus) in a river. Alps, Haute-Savoie, France. October. Invasive species.
Signal crayfish (Pacifastacus leniusculus) seeking new habitat walking across land. Claws raised in defense, Rookery Wood, Sussex, England, UK. August.  -  Stephen  Dalton
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Stephen Dalton / Signal crayfish (Pacifastacus leniusculus) seeking new habitat walking across land. Claws raised in defense, Rookery Wood, Sussex, England, UK. August.
Signal crayfish (Pacifastacus leniusculus) waving claw, Idar-Oberstein, Hunsruck, Germany, January. Meetyourneighbours.net project  -  MYN  / Dirk Funhoff
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MYN / Dirk Funhoff / Signal crayfish (Pacifastacus leniusculus) waving claw, Idar-Oberstein, Hunsruck, Germany, January. Meetyourneighbours.net project
Signal crayfish (Pacifastacus leniusculus) Idar-Oberstein, Hunsruck, Germany, January. Meetyourneighbours.net project  -  MYN  / Dirk Funhoff
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MYN / Dirk Funhoff / Signal crayfish (Pacifastacus leniusculus) Idar-Oberstein, Hunsruck, Germany, January. Meetyourneighbours.net project
Signal crayfish (Pacifastacus leniusculus) claw, Idar-Oberstein, Hunsruck, Germany, January. Meetyourneighbours.net project  -  MYN  / Dirk Funhoff
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MYN / Dirk Funhoff / Signal crayfish (Pacifastacus leniusculus) claw, Idar-Oberstein, Hunsruck, Germany, January. Meetyourneighbours.net project
Signal crayfish (Pacifastacus leniusculus) Idar-Oberstein, Hunsruck, Germany, January. Meetyourneighbours.net project  -  MYN  / Dirk Funhoff
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MYN / Dirk Funhoff / Signal crayfish (Pacifastacus leniusculus) Idar-Oberstein, Hunsruck, Germany, January. Meetyourneighbours.net project
Signal crayfish (Pacifastacus leniusculus) Idar-Oberstein, Hunsruck, Germany, January. Meetyourneighbours.net project  -  MYN  / Dirk Funhoff
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MYN / Dirk Funhoff / Signal crayfish (Pacifastacus leniusculus) Idar-Oberstein, Hunsruck, Germany, January. Meetyourneighbours.net project
Signal Crayfish (Pacifastacus leniusculus) a species that has been introduced from the USA into Europe and Japan, seen here feeding on a fish.  -  Visuals Unlimited
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Visuals Unlimited / Signal Crayfish (Pacifastacus leniusculus) a species that has been introduced from the USA into Europe and Japan, seen here feeding on a fish.
Signal Crayfish (Pacifastacus leniusculus) a species that has been introduced from the USA into Europe and Japan  -  Visuals Unlimited
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Visuals Unlimited / Signal Crayfish (Pacifastacus leniusculus) a species that has been introduced from the USA into Europe and Japan
Signal Crayfish (Pacifastacus leniusculus), a species that has been introduced from the USA into Europe and Japan, captive  -  Visuals Unlimited
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Visuals Unlimited / Signal Crayfish (Pacifastacus leniusculus), a species that has been introduced from the USA into Europe and Japan, captive
Signal Crayfish (Pacifastacus leniusculus), a species that has been introduced from the USA into Europe and Japan  -  Visuals Unlimited
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Visuals Unlimited / Signal Crayfish (Pacifastacus leniusculus), a species that has been introduced from the USA into Europe and Japan
Signal Crayfish (Pacifastacus leniusculus), a species introduced to the UK from North America.  They are far larger and more aggressive than the native species, and can easily out-compete them. Photog...  -  Alex Hyde
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Alex Hyde / Signal Crayfish (Pacifastacus leniusculus), a species introduced to the UK from North America. They are far larger and more aggressive than the native species, and can easily out-compete them. Photog...
Signal Crayfish (Pacifastacus leniusculus) on lake bottom, Wraysbury Lake, Middlesex, England, May  -  Linda Pitkin / 2020VISION
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Linda Pitkin / 2020VISION / Signal Crayfish (Pacifastacus leniusculus) on lake bottom, Wraysbury Lake, Middlesex, England, May
Signal Crayfish (Pacifastacus leniusculus) on lake bottom, Wraysbury Lake, Middlesex, England, May  -  Linda Pitkin / 2020VISION
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Linda Pitkin / 2020VISION / Signal Crayfish (Pacifastacus leniusculus) on lake bottom, Wraysbury Lake, Middlesex, England, May
Signal Crayfish (Pacifastacus leniusculus) placed on a population spread monitoring map, River Till, Northumberland, England, UK, October  -  Rob Jordan / 2020VISION
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Rob Jordan / 2020VISION / Signal Crayfish (Pacifastacus leniusculus) placed on a population spread monitoring map, River Till, Northumberland, England, UK, October
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