The marsh frog (Pelophylax ridibundu) an escaped garden alien introduced to Kent in 1935, England, United Kingdom, Europe

Reindeer (Rangifer tarandus) introduced from Norway, Stromness Bay, South Georgia Island, Polar Regions

Introduced adult European rabbit (Oryctolagus cuniculus), New Island, Falklands, South Atlantic Ocean, South America

Reindeer (Rangifer tarandus) introduced from Norway, Stromness Bay, South Georgia Island, Polar Regions

Reindeer (Rangifer tarandus) introduced from Norway, Stromness Bay, South Georgia Island, Polar Regions

A small group of introduced reindeer (Rangifer tarandus) before eradication in Stromness Bay, South Georgia, Polar Regions

A small group of introduced reindeer (Rangifer tarandus) before eradication in Stromness Bay, South Georgia, Polar Regions

The introduced and very invasive European rabbit (Oryctolagus cuniculus), outside Stanley, Falkland Islands, South America

Male Jamaican Anole Lizard (Anolis Grahami) with Dewlap extended, introduced to Bermuda in 1905 to eat fruit flies, Bermuda, Atlantic, Central America

An introduced adult cane toad (Rhinella marina), at night on the Volivoli Resort grounds on Viti Levu, Fiji, South Pacific, Pacific

A small group of introduced reindeer (Rangifer tarandus) before eradication in Stromness Bay, South Georgia, Polar Regions

A small group of introduced reindeer (Rangifer tarandus) before eradication in Stromness Bay, South Georgia, Polar Regions

A small group of introduced reindeer (Rangifer tarandus) before eradication in Stromness Bay, South Georgia, Polar Regions

A small group of introduced reindeer (Rangifer tarandus) before eradication in Stromness Bay, South Georgia, Polar Regions

An adult bull introduced reindeer (Rangifer tarandus) before eradication in Stromness Bay, South Georgia, Polar Regions

An adult bull introduced reindeer (Rangifer tarandus) before eradication in Stromness Bay, South Georgia, Polar Regions

An introduced adult cane toad (Rhinella marina), at night on the Volivoli Resort grounds on Viti Levu, Fiji, South Pacific, Pacific

King penguin (Aptenodytes patagonicus) with introduced reindeer at breeding and nesting colony at St. Andrews Bay on South Georgia, Southern Ocean, Polar Regions

King penguin (Aptenodytes patagonicus) with introduced reindeer at breeding and nesting colony at St. Andrews Bay on South Georgia, Southern Ocean, Polar Regions

An adult bull introduced reindeer (Rangifer tarandus) before eradication in Stromness Bay, South Georgia, Polar Regions

An adult bull introduced reindeer (Rangifer tarandus) before eradication in Stromness Bay, South Georgia, Polar Regions

Adult bull introduced reindeer (Rangifer tarandus) before eradication in Stromness Bay, South Georgia, Polar Regions

Male Jamaican Anole Lizard (Anolis Grahami) with Dewlap extended, introduced to Bermuda in 1905 to eat fruit flies, Bermuda, Atlantic, Central America

Great seated Buddha and dagoba at Mihintale, the site where Buddhism was introduced to the island in the 3rd century BC, Sri Lanka, Asia

King penguin (Aptenodytes patagonicus) with introduced reindeer at breeding and nesting colony at St. Andrews Bay on South Georgia, Southern Ocean, Polar Regions

A small group of introduced reindeer (Rangifer tarandus) before eradication in Stromness Bay, South Georgia, Polar Regions

An adult bull introduced reindeer (Rangifer tarandus) before eradication in Stromness Bay, South Georgia, Polar Regions

An adult bull introduced reindeer (Rangifer tarandus) before eradication in Stromness Bay, South Georgia, Polar Regions

An adult bull introduced reindeer (Rangifer tarandus) before eradication in Stromness Bay, South Georgia, Polar Regions

Jamaican Anole Lizard (Anolis Grahami) introduced to Bermuda in 1905 to eat fruit flies, Bermuda, North Atlantic, North America

The introduced Perez's frog (Iberian waterfrog) (Iberian green frog) (Pelophylax perezi) on the island of Sao Miguel, Azores, Portugal, Europe

Great Kiskadee (Pitangus Sulphuratus), introduced to Bermuda in 1957 to try to control the Anole lizard, Bermuda, Atlantic, Central America

An adult nutria (Myocastor coypus), an invasive species introduced from South America, Spree Forest, Germany, Europe

Great Kiskadees (Pitangus Sulphuratus), originally introduced to Bermuda in 1957 to try to control the Anole lizard, Bermuda, Atlantic, Central America

An adult nutria (Myocastor coypus), an invasive species introduced from South America, Spree Forest, Germany, Europe

An adult nutria (Myocastor coypus), an invasive species introduced from South America, Spree Forest, Germany, Europe

Part of a reindeer herd introduced by Norwegian whalers in 1911, South Georgia, Polar Regions

Anuradha Koirala, proclaimed winner of CNN Hero of the Year 2010, warmly greeted upon her return. Tribhuwan International Airport, Kathmandu, Nepal. A woman whose group has rescued more than 12,000 women and girls from sex slavery has been named the 2010 CNN Hero of the Year. Anuradha Koirala was chosen by the public in an online poll that ran for eight weeks on CNN.com. ?Human trafficking is a crime, a heinous crime, a shame to humanity,? Koirala said after being introduced as one of the top 10 CNN Heroes of 2010. ?I ask everyone to join me to create a society free of trafficking. We need to do this for all our daughters

Anuradha Koirala holds up her CNN Hero of the Year 2010 award as she is warmly greeted upon her return. Tribhuwan International Airport, Kathmandu, Nepal. A woman whose group has rescued more than 12,000 women and girls from sex slavery has been named the 2010 CNN Hero of the Year. Anuradha Koirala was chosen by the public in an online poll that ran for eight weeks on CNN.com. ?Human trafficking is a crime, a heinous crime, a shame to humanity,? Koirala said after being introduced as one of the top 10 CNN Heroes of 2010. ?I ask everyone to join me to create a society free of trafficking. We need to do this for all our daughters

Marana Regional Airport, Wings of Freedom Tour, airshow, Boeing B-17G Flying Fortress, introduced in 1938, Marana, Arizona, United States of America, North America

Marana Regional Airport, Wings of Freedom Tour, airshow, Boeing B-17G Flying Fortress, introduced in 1938, Marana, Arizona, United States of America, North America

Cargo of acacia wood, an introduced species, Balikpapan Bay, East Kalimantan, Borneo, Indonesia, Southeast Asia, Asia

Cargo of acacia wood, an introduced species, Balikpapan Bay, East Kalimantan, Borneo, Indonesia, Southeast Asia, Asia

Marana Regional Airport, Wings of Freedom Tour, airshow, Boeing B-17G Flying Fortress, introduced in 1938, Marana, Arizona, United States of America, North America

Marana Regional Airport, Wings of Freedom Tour, airshow, Boeing B-17G Flying Fortress, introduced in 1938, Marana, Arizona, United States of America, North America

Black swan (cygnus atratus) resting with head on back, slimbridge, uk

Black swan (cygnus atratus) close,up, head in water foraging for food, slimbridge, uk

European Chub (Squalius or Leuciscus cephalus) shoal in the clear water of Plitvice Lakes National Park, Croatia. MORE INFO: Chub traditionally inhabit more lowland waters in Croatia, but they have proliferated since being introduced to Plitvice Lakes, which are warmer than in the past due to climate change, and they have reduced native trout populations considerably by predating their eggs.

An ancient carved outline of a Birlinn and ship introduced by the Norse to Scotland on an ancient chapel near Toberonochy, Isle of Luing, Slate Islands, Argyll, Scotland, United Kingdom, Europe

King penguin (Aptenodytes patagonicus) with introduced reindeer at breeding and nesting colony at St. Andrews Bay on South Georgia, Southern Ocean.

National Park staff spray weed killer on introduced plant species that are out-competing native flora in the Snowy Mountains, New South Wales, Australia, Pacific

National Park staff spray weed killer on introduced plant species that are out-competing native flora in the Snowy Mountains, New South Wales, Australia, Pacific

This is the most common ladybird in Europe, introduced in many countries as pests control agents as they are voracious predators of aphids

This is the most common ladybird in Europe, introduced in many countries as pests control agents as they are voracious predators of aphids

This is the most common ladybird in Europe, introduced in many countries as pests control agents as they are voracious predators of aphids

Rhesus Macaque Monkey

Tokay Gecko

Tokay Gecko Hatching

Yellow-bellied slider (Trachemys scripta scripta, Pseudemys scripta scripta), found in North America, introduced to Europe, North Rhine-Westphalia, Germany, Europe

Raccoon (Procyon lotor), found in North America, introduced to Germany, Hesse, Germany, Europe

The Cuban Knight Anole (Anolis equestris) is the largest anole in the world. It is native to Cuba, but has been introduced to South Florida. Growing to a length of 13 to 20 inches it is fiercely territorial and aggressive to anything that enters its territory

Jennifer Carroll, oyster hatchery manager and researcher at Center of Marine Biotechnology, Baltimore MD.She is holding a diploid Asian oyster C. ariakensis in the "algae kitchen" in the biosecure laboratory. She is studying reproduction to determine whether to introduce into the bay.

The Peacock Grouper (Cephalopholis argus) was deliberately introduced to Hawaii and is now considered an invasive species, Island of Hawaii, Hawaii, United States of America

This gold dust day gecko (Phelsuma laticauda) resting on a palm tree was photographed on the Kona coast of the Big Island, Hawaii, where it is an introduced species, Island of Hawaii, Hawaii, United States of America

Ceramic figure of el Tio or Supai, a creature with horns, gleaming eyes and a big penis, that in fact is not really satanic. It was introduced by the Spaniards in the 16th Century to the mines of Potosi. According to tradition, el Tio (The Uncle) rules over the mines of Cerro Rico, simultaneously offering protection and destruction. Over 500 chambers with statues to honour him have been constructed in Cerro Rico, so miners can leave offerings of tobacco, liquor and coca leaves to invoke his goodwill and protection., Potosi Department, Bolivia

Ceramic figure of el Tio or Supai, a creature with horns, gleaming eyes and a big penis, that in fact is not really satanic. It was introduced by the Spaniards in the 16th Century to the mines of Potosi. According to tradition, el Tio (The Uncle) rules over the mines of Cerro Rico, simultaneously offering protection and destruction. Over 500 chambers with statues to honour him have been constructed in Cerro Rico, so miners can leave offerings of tobacco, liquor and coca leaves to invoke his goodwill and protection., Potosi Department, Bolivia

Ceramic figure of el Tio or Supai, a creature with horns, gleaming eyes and a big penis, that in fact is not really satanic. It was introduced by the Spaniards in the 16th Century to the mines of Potosi. According to tradition, el Tio (The Uncle) rules over the mines of Cerro Rico, simultaneously offering protection and destruction. Over 500 chambers with statues to honour him have been constructed in Cerro Rico, so miners can leave offerings of tobacco, liquor and coca leaves to invoke his goodwill and protection., Potosi Department, Bolivia

The Blacktail Snapper (Lutjanus fulvus) reach 13 inches in length and feed mostly on small fish and crabs. This is one of several species that were sucessfully introduced to Hawaii, Hawaii, United States of America

Giant Seychelles tortoise (Aldabrachelys gigantea), Turtle island, Prison island, Zanzibar. This island was used as a prison for slaves, and four giant Seychelles tortoises were introduced. Today, they are protected from poachers, and the oldest are between 170 and 200 years old.

Leopard seal (Hydrurga leptonyx) on the beach of Ulva Island in New Zealand wich is "predatory free" because cleared of introduced mammals predators. The Leopard seal is fairly regular in the area and it was really amazing to observe it on a beach and not in the middle of the Antarctic ice.