Doug Perrine / Sand tiger shark {Carcharias taurus}, Atlantic Ocean.

Doug Perrine / Sand tiger sharks {Carcharias taurus} and fish shoal, Papoose wreck, N Carolina, USA Atlantic Ocean (Non-ex).

Doug Perrine / Sand tiger shark portrait {Carcharias taurus} Papoose wreck, N Carolina, USA, Atlantic Ocean (Non-ex).

Doug Perrine / Sand tiger shark {Carcharias taurus} Papoose wreck, N Carolina, USA, Atlantic Ocean (Non-ex).

Jeff Rotman / Sand tiger shark (Carcharias taurus). Caribbean, Atlantic Ocean

Jeff Rotman / Sand tiger shark (Carcharias taurus) Caribbean

Jeff Rotman / Sand tiger shark (Carcharias taurus). Caribbean

Jeff Rotman / Sand Tiger Shark (Carcharias taurus) North Carolina, USA. Atlantic Ocean.

Alex Mustard / A large female Grey nurse /Sand Tiger / Ragged-tooth Shark (Carcharias taurus) Fish Rock, Southwest Rock, New South Wales, Australia. Pacific Ocean. In the final stages of pregancy, female gray nurse...

Alex Mustard / Grey nurse /Sand Tiger / Ragged-tooth Shark (Carcharias taurus) Fish Rock, Southwest Rock, New South Wales, Australia. Pacific Ocean. November

Alex Mustard / Grey nurse /Sand Tiger / Ragged-tooth Shark (Carcharias taurus) close up, Fish Rock, Southwest Rock, New South Wales, Australia. Pacific Ocean. November

Alex Mustard / Grey nurse /Sand Tiger / Ragged-tooth Shark (Carcharias taurus) Fish Rock, Southwest Rock, New South Wales, Australia. Pacific Ocean. November

Jeff Rotman / Sand tiger shark (Eugomphodus / Carcharias taurus) at night, Pacific Ocean, New South Wales, Australia

Norbert Wu / Grey Nurse Shark (Carcharias taurus) swimming near Papoose Wreck off North Carolina

Norbert Wu / Grey Nurse Shark (Carcharias taurus) pair and other small fish swimming through Papoose Wreck off North Carolina

Norbert Wu / Grey Nurse Shark (Carcharias taurus) swimming through Papoose Wreck with other small fish, off North Carolina

Norbert Wu / Grey Nurse Shark (Carcharias taurus) swimming through Papoose Wreck off North Carolina

Doug Perrine / Sand tiger shark {Carcharias taurus} Atlantic Ocean, USA

Doug Perrine / Tooth in lower jaw of Sand tiger shark {Carcharias taurus}

Doug Perrine / Teeth of Sand tiger shark {Carcharias taurus} or Grey nurse shark {Odontaspis taurus}

Doug Perrine / Male Sand tiger shark showing claspers and lateral line {Carcharias taurus} Grey nurse

Todd Pusser / Captive Sand tiger shark {Carcharias taurus}, North Carolina Aquarium, USA.

Norbert Wu / Grey Nurse Shark (Carcharias taurus) close-up of teeth and nose, Steinhart Aquarium, San Francisco, California

Norbert Wu / Grey Nurse Shark (Carcharias taurus) close-up of teeth and nose, Steinhart Aquarium, San Francisco, California

Fred Bavendam / Grey Nurse Shark (Carcharias taurus) swimming among schools of fish, New South Wales Australia

Fred Bavendam / Grey Nurse Shark (Carcharias taurus) underwater portrait, New South Wales Australia

Fred Bavendam / Grey Nurse Shark (Carcharias taurus) underwater portrait, New South Wales Australia

Jeff Rotman / Close up of teeth of Sand Tiger shark {Carcharias taurus} New South Wales, Australia.

Jeff Rotman / Sand tiger shark. Caribbean (Carcharias taurus)

Jabruson / Girl watching Sand tiger shark in Two oceans aquarium, Cape Town, South Africa

Doug Perrine / Sand tiger shark {Carcharias taurus} Papoose wreck, N Carolina, USA, Atlantic Ocean (Non-ex).

Doug Perrine / Sand tiger shark {Carcharias taurus} swimming through shoal of fish, Papoose wreck, N Carolina, USA, Atlantic Ocean (Non-ex).

Doug Perrine / Sand tiger shark {Carcharias taurus} Papoose wreck, N Carolina, USA, Atlantic Ocean (Non-ex).

Doug Perrine / Sand tiger shark {Carcharias taurus} North Carolina, Atlantic Ocean (Non-ex).

Doug Perrine / Sand tiger shark {Carcharias taurus} N Carolina, USA Atlantic Ocean (Non-ex).

Doug Perrine / Juvenile Sand tiger / Grey Nurse shark {Carcharias taurus} New South Wales, Australia (Non-ex).

Doug Perrine / Sand tiger sharks {Carcharias taurus} Papoose wreck, N Carolina, USA, Atlantic Ocean (Non-ex).

TOM WALMSLEY / Close up of claspers (male sex organs) of Sand tiger / Raggedtooth shark {Carcharias taurus} Cape Peninsular, South Africa

Jeff Rotman / Sand tiger shark at night (Carcharias taurus)

Jeff Rotman / Diver inspects Sand tiger shark caught in anti-shark net {Carccharias taurus} Durban, South Africa Model released.

Ian Coleman / Illustration of fins of Sand tiger shark (Carcharias taurus). Endangered/threatened species.

Ian Coleman / Illustration of Sand tiger shark / Grey nurse shark / Spotted ragtooth shark (Carcharias taurus), Odontaspididae. Not to be confused with nurse shark. Endangered / threatened species.

Pete Oxford / Red-backed Hawk (Buteo polyosoma polyosoma) perched on post. Keppel Island. Off north coast of West Falkland. Falkland Islands

Roy Mangersnes / Red-backed buzzard / hawk (Buteo polyosoma) in the Andean mountains near Valle Nevado, Santiago, Chile. October.

Juan Manuel Borrero / Woman with Red-backed buzzard (Buteo polyosoma) on string, Yanque, Peru 2006.

Juan Manuel Borrero / Red-backed Buzzard (Buteo polyosoma) captive, Peru

Gabriel Rojo / Red backed buzzard juvenile flying {Buteo polyosoma} Argentina

Peter Scoones / Red backed buzzard {Buteo polyosoma} calling, Falkland Is

Hanne & Jens Eriksen / Red backed Hawk {Buteo polyosoma} resting on ground, Falkland Islands.

Hanne & Jens Eriksen / Red backed Hawk {Buteo polyosoma} Falkland Islands.

Gabriel Rojo / Red backed buzzard {Buteo polyosoma} hovering, Punta Norte, Chubut Province, Argentina.

Pete Oxford / Variable hawk in flight {Buteo polyosoma} Andes, Ecuador

Gabriel Rojo / Red backed buzzard {Buteo polyosoma} Argentina

Pete Oxford / Red backed buzzard calling, Falkland Islands

Pete Oxford / Red backed buzzard (Buteo polyosoma) hovering Falkland Is. Engineer Point, E Falkland Is.

Pete Oxford / Red backed buzzard (Buteo polyosoma) Falkland Island, Antarctica