Gerrit Vyn / Porcupine (Erethizon dorsatum) on tundra. North Slope, Alaska, USA. September.

Steven Kazlowski / North American porcupine (Erethizon dorsatum) pup feeds on Alaskan high brush cranberries in the foothills of the Takshanuk Mountains, South-East Alaska, USA

Rod Williams / North American Porcupine (Erethizon dorsatum). Captive. Endemic to North America. Captive. UK, May.

Claudio Contreras / Balloon fish (Diodon holocanthus) with defensive spines, Puerto Morelos National Park, Caribbean Sea, Mexico, January

Konrad Wothe / Common Porcupine (Erethizon dorsatum), North America

Tim Fitzharris / Common Porcupine (Erethizon dorsatum) portrait, Montana

Tim Fitzharris / Common Porcupine (Erethizon dorsatum) feeding on fruit, Montana

Matthias Breiter / Common Porcupine (Erethizon dorsatum) in willow tree near the Denali highway, Alaska

Michael Quinton / Common Porcupine (Erethizon dorsatum) feeding on Pussy Willow (Salix discolor) in spring, Alaska

Michael Quinton / Common Porcupine (Erethizon dorsatum) sitting in a tree in winter, Yellowstone National Park, Wyoming

Michael Quinton / Common Porcupine (Erethizon dorsatum) feeding on Pussy Willow (Salix discolor) in spring, Alaska

LYNN M. STONE / North american porcupine in tree in winter, USA.

George Sanker / North American porcupine (Erethizon dorsatum) feeding. Yellowstone National Park, Wyoming, USA. May.

George Sanker / North American porcupine (Erethizon dorsatum) feeding. Yellowstone National Park, Wyoming, USA. May.

George Sanker / North American porcupine (Erethizon dorsatum) feeding on riverbank. Yellowstone National Park, Wyoming, USA. May.

Franco Banfi / Diamond stingray (Dasyatis brevis) with Longspined porcupinefish (Diodon holocanthus), Cabo Pulmo Marine National Park, Baja California Sur, Mexico

Claudio Contreras / Ghost Crab (Ocypode sp.) eating Balloonfish (Diodon holocanthus) carcass, Playa Morro Ayuta, Oaxaca state, southern Mexico, August

Claudio Contreras / Balloonfish (Diodon holocanthus), San Agustin Bay, Huatulco Bays National Park, southern Mexico, November

Claudio Contreras / Balloonfish (Diodon holocanthus), San Agustin Bay, Huatulco Bays National Park, southern Mexico, November

Paul Williams / North American porcupine (Erethizon dorsatum), leaving its rocky den, Vermont, USA. (Habituated rescued individual returned to the wild)

Paul Williams / North American porcupine (Erethizon dorsatum), leaving its rocky den, Vermont, USA. (Habituated rescued individual returned to the wild)

Paul Williams / North American porcupine (Erethizon dorsatum), leaving its rocky den, Vermont, USA. (Habituated rescued individual returned to the wild)

Paul Williams / North American porcupine (Erethizon dorsatum) with a maple syrup tapping tube. These tubes are used to carry sap to large tanks. Porcupines have learned to bite the tubes so that they can drink the li...

Paul Williams / Bite marks on a tree caused by a North American porcupine (Erethizon dorsatum), Vermont, USA. (Habituated rescued individual returned to the wild)

Paul Williams / Bite marks on a tree caused by a North American porcupine (Erethizon dorsatum), Vermont, USA. (Habituated rescued individual returned to the wild)

Paul Williams / Bite marks on a tree caused by a North American porcupine (Erethizon dorsatum), Vermont, USA. (Habituated rescued individual returned to the wild)

Paul Williams / Bite marks on a tree caused by a North American porcupine (Erethizon dorsatum), Vermont, USA. (Habituated rescued individual returned to the wild)

Paul Williams / North American porcupine (Erethizon dorsatum) in snow, Vermont, USA. (Habituated rescued individual returned to the wild)

Paul Williams / North American porcupine (Erethizon dorsatum), climbing a tree in snow, Vermont, USA. (Habituated rescued individual returned to the wild)

Paul Williams / North American porcupine (Erethizon dorsatum), climbing a tree in snow, Vermont, USA. (Habituated rescued individual returned to the wild)

Paul Williams / North American porcupine (Erethizon dorsatum), climbing a tree in snow. Vermont, USA. (Habituated rescued individual returned to the wild)

Paul Williams / Cameraman filming a North American porcupine (Erethizon dorsatum), Vermont, USA. (Habituated rescued individual returned to the wild)

Paul Williams / North American porcupine (Erethizon dorsatum) with a maple syrup tapping tube. These tubes are used to carry sap to large tanks. Porcupines have learned to bite the tubes so that they can drink the li...

Paul Williams / North American porcupine (Erethizon dorsatum) with a maple syrup tapping tube. These tubes are used to carry sap to large tanks. Porcupines have learned to bite the tubes so that they can drink the li...

Paul Williams / North American porcupine (Erethizon dorsatum), in defensive posture with erect quills. Vermont, USA. (Habituated rescued individual returned to the wild)

Paul Williams / North American porcupine (Erethizon dorsatum) in snow, Vermont, USA. (Habituated rescued individual returned to the wild)

Paul Williams / North American porcupine (Erethizon dorsatum) in snow, Vermont, USA. (Habituated rescued individual returned to the wild)

Paul Williams / North American porcupine (Erethizon dorsatum), feeding on a young spruce tree. Vermont, USA. (Habituated rescued individual returned to the wild)

Paul Williams / North American porcupine (Erethizon dorsatum), feeding on a young spruce tree. Vermont, USA. (Habituated rescued individual returned to the wild)

Paul Williams / North American porcupine (Erethizon dorsatum), feeding on a young spruce tree. Vermont, USA. (Habituated rescued individual returned to the wild)

Paul Williams / North American porcupine (Erethizon dorsatum), feeding on a young spruce tree. Vermont, USA. (Habituated rescued individual returned to the wild)

Paul Williams / North American porcupine (Erethizon dorsatum) in snow, Vermont, USA. (Habituated rescued individual returned to the wild)

Paul Williams / North American porcupine (Erethizon dorsatum), leaving its rocky den, Vermont, USA. (Habituated rescued individual returned to the wild)

Franco Banfi / Long-spine porcupinefish (Diodon holocanthus) Salvatierra wreck dive site, Sea of Cortez, Baja California, Mexico, East Pacific Ocean

Franco Banfi / Spotted porcupinefish (Diodon hystrix) between the plates of the Salvatierra wreck, Sea of Cortez, Baja California, Mexico, East Pacific Ocean

Sylvain Cordier / North American porcupine (Erethizon dorsatum), captive, USA, September.

Claudio Contreras / Spotfin Burrfish (Chilomycterus reticulatus), Socorro Island, Revillagigedo Archipelago Biosphere Reserve / Archipielago de Revillagigedo UNESCO Natural World Heritage Site (Socorro Islands), Pacific...

Gerrit Vyn / Porcupine (Erethizon dorsatum) on tundra. North Slope, Alaska, USA. September.

Pascal Kobeh / Longspined porcupinefish / balloonfish (Diodon holocanthus) Baja California peninsula, Mexico. Sea of Cortez.

MYN / Seth Patterson / Striped Burrfish (Chilomycterus schoepfi) profile, Lower Laguna Madre, South Padre Island, Cameron County, Lower Rio Grande Valley, Texas, United States of America, North America, May. Meetyourneighbo...

MYN / Seth Patterson / Striped Burrfish (Chilomycterus schoepfi) portrait, Lower Laguna Madre, South Padre Island, Cameron County, Lower Rio Grande Valley, Texas, United States of America, North America, May. Meetyourneighb...

Claudio Contreras / Balloonfish (Diodon holocanthus), Cabo Pulmo National Park, Sea of Cortez (Gulf of California), Mexico, July

Steven Kazlowski / North American porcupine (Erethizon dorsatum) pup feeds on Alaskan high brush cranberries in the foothills of the Takshanuk Mountains, South-East Alaska, USA

Claudio Contreras / North American Porcupine (Erethizon dorsatum), Janos Biosphere Reserve, northern Mexico, February.

Konrad Wothe / North American porcupine with young (Erethizon dorsatum) Alaska, USA, July

MYN / Paul Marcellini / Longspined burrfish / Balloon fish (Diodon holocanthus) Florida, USA, November. meetyourneighbours.net project

MYN / Paul Marcellini / Longspined burrfish / Balloon fish (Diodon holocanthus) Florida, USA, November. meetyourneighbours.net project

Rod Williams / North American Porcupine (Erethizon dorsatum). Captive. Endemic to North America. Captive. UK, May.

Pete Oxford / Balloonfish (Diodon holocanthus) beside fan coral, Coral Reef Island, Belize Barrier Reef, Belize

Rolf Nussbaumer / North American Porcupine {Erethizon dorsatum} climbing Texas Oak tree (Quercus buckleyi) Hill Country, Texas, USA

Konrad Wothe / Common Porcupine (Erethizon dorsatum) in tree, North America

Mary McDonald / North American porcupine {Erethizon dorsatum} climbing, USA

LYNN M. STONE / North American porcupine {Erethizon dorsatum} with deer's antler, Montana, USA

Thomas Lazar / North american porcupine {Erethizon dorsatum} sitting on post, Kettle River, Minnestota, USA

LYNN M. STONE / North american porcupine {Erethizon dorsatum} amongst birch leaves and antler, Captive, USA

LYNN M. STONE / North american porcupine {Erethizon dorsatum} amongst birch leaves and antler, Captive, USA

LYNN M. STONE / North american porcupine {Erethizon dorsatum} climbing tree in snow, Captive, USA

LYNN M. STONE / North American porcupine (Erethizon dorsatum) USA

Larry Michael / Underside of North american porcupine showing teeth {Erethizon dorsatum} captive, Illinois, USA

Niall Benvie / Young North american porcupine climbing tree {Erethizon dorsatum}

Konrad Wothe / Common Porcupine (Erethizon dorsatum) baby, North America

Konrad Wothe / Common Porcupine (Erethizon dorsatum) baby climbing in tree, North America

Konrad Wothe / Common Porcupine (Erethizon dorsatum) mother and baby in tree, North America

Michael Quinton / Common Porcupine (Erethizon dorsatum) feeding on Pussywillow (Salix discolor) in the spring, Alaska

Michael Quinton / Common Porcupine (Erethizon dorsatum) feeding on Mistletoe (Phoradendron serotinum) in winter, Island Park, Idaho

Patricio Robles Gil / North american porcupine in tree {Erethizion dorsatum} Chihuahua, Mexico

LYNN M. STONE / North American porcupine in tree. (Erethizon dorsatum) Montana, captive US

LYNN M. STONE / North American porcupine, Autumn Rocky Mountains USA

David Fleetham / Spotted porcupinefish (Diodon hystrix), Maui, Hawaii. Porcupinefish are also known as blowfish, balloonfish or globefish.

David Fleetham / Inflated spotted porcupinefish (Diodon hystrix), Maui, Hawaii.

David Fleetham / Scuba diver photographing spotted porcupinefish (Diodon hystrix), Hawaii.

Laurent Geslin / Skull with teeth of North american porcupine {Erethizon dorsatum}

Joel Sartore / Photo Ark / North American porcupine (Erethizon dorsatum bruneri) female albino, portrait, Nebraska Wildlife Rehab, Louisville, Nebraska, USA. Captive.

Joel Sartore / Photo Ark / North American porcupine (Erethizon dorsatum bruneri) female albino, portrait, Nebraska Wildlife Rehab, Louisville, Nebraska, USA. Captive.

Joel Sartore / Photo Ark / North American porcupine (Erethizon dorsatum bruneri) female albino, portrait, Nebraska Wildlife Rehab, Louisville, Nebraska, USA. Captive.

Joel Sartore / Photo Ark / North American porcupine (Erethizon dorsatum bruneri) female albino, portrait, Nebraska Wildlife Rehab, Louisville, Nebraska, USA. Captive.

Joel Sartore / Photo Ark / North American porcupine (Erethizon dorsatum dorsatum) portrait, Calgary Wildlife Rehabilitation Society, Alberta, Canada. Captive.

Joel Sartore / Photo Ark / North American porcupine (Erethizon dorsatum dorsatum) portrait, Calgary Wildlife Rehabilitation Society, Alberta, Canada. Captive.

Franco Banfi / Long-spine porcupinefish (Diodon holocanthus) swimming over seabed, Espiritu Santo Island, Baja California, Mexico, Sea of Cortez.

Joel Sartore / Photo Ark / North American porcupine (Erethizon dorsatum) turns around and then walks across the frame. Calgary Wildlife, Canada. Captive.

Joel Sartore / Photo Ark / North American porcupine (Erethizon dorsatum) turns around and then looks at the camera. Then the animal lies down. Calgary Wildlife, Canada. Captive.

Claudio Contreras / Long-spine porcupinefish (Diodon holocanthus) swimming through coral reef. Huatulco Bays National Park, Oaxaca state, Mexico, Pacific Ocean. November.

Pascal Kobeh / Longspined porcupinefish (Diodon holocanthus) in front of a school of Yellow / Amarillo snappers (Lutjanus argentiventris) and a Pacific dog snapper (Lutjanus novemfasciatus), swimming over seabed, Se...

Roland Seitre / North American porcupine (Erethizon dorsatum) feeding, captive in zoo. Occurs in North America.

Roland Seitre / North American porcupine (Erethizon dorsatum) captive in zoo.Occurs in North America.

Roland Seitre / North-American porcupine (Erethizon dorsatum) portrait, captive. Minnesota, USA.