Top 100 Most Rare Animals In The World

The World's 100 most threatened species[1] is a compilation of the most threatened animals, plants, and fungi in the world. It was the result of a collaboration between over 8,000 scientists from the International Union for Conservation of Nature Species Survival Commission (IUCN SSC), along with the Zoological Society of London.[2] The report was published by the Zoological Society of London in 2012 as the book, Priceless or Worthless?[3]

Top 100 Most Rare Animals In The World

Welcome to "One Hundred of the World's Worst Invasive Alien Species", funded by La Fondation TOTAL, and part of the Global Invasive Species Database. Invasive species have been recognised globally as a major threat to biodiversity (the collected wealth of the world's species of plants, animals and other organisms) as well as to agriculture and other human interests.

Cane toads were introduced to many countries as biological control agents for various insect pests of sugarcane and other crops. The cane toads have proved to be pests themselves. They will feed on almost any terrestrial animal and compete with native amphibians for food and breeding habitats. Their toxic secretions are known to cause illness and death in domestic animals that come into contact with them, such as dogs and cats, and wildlife, such as snakes and lizards. Human fatalities have been recorded following ingestion of the eggs or adults.Common Names: Aga-Kröte, bufo toad, bullfrog, cane toad, crapaud, giant American toad, giant toad, kwapp, macao, maco pempen, Maco toro, marine Toad, Suriname toad

The introduction of fish as a source of protein for human consumption into tropical and subtropical lake systems is continuing apace. The common carp (Cyprinus carpio) has been cultured for 2500 years and is also a popular angling and ornamental fish; is the third most frequently introduced species in the world. Its method of feeding churns up the sediments on the bottom of the water and uproots macrophytes, making it an keystone ecosystem engineer that altering habitats for native fish and other native aquatic species.Common Names: Cá Chép, carp, carpa, carpat, carpe, carpeau, carpe commune, carpo, cerpyn, ciortan, ciortanica, ciortocrap, ciuciulean, common carp, crapcean, cyprinos, escarpo, Europäischer Karpfen, European carp, fancy carp, feral carp, German carp, grass carp, grivadi, ikan mas, Japanese domesticated carp, kapoor-e-maamoli, kapor, kapr obecný, karp, karpa, karpar, karp dziki a. sazan, karpe, Karpe, karpen, karper, karpfen, karpion, karppi, kerpaille, king carp, koi, koi carp, korop, krapi, kyprinos, læderkarpe, lauk mas, leather carp, leekoh, lei ue, mas massan, mirror carp, olocari, Oriental carp, pa nai, pba ni, pla nai, ponty, punjabe gad, rata pethiya, saran, Saran, sarmão, sazan, sazan baligi, scale carp, sharan, skælkarpe, soneri masha, spejlkarpe, sulari, suloi, tikure, trey carp samahn, trey kap, ulucari, weißfische, wild carp, wildkarpfen

Felis catus was domesticated in the eastern Mediterranean c. 3000 years ago. Considering the extent to which cats are valued as pets, it is not surprising that they have since been translocated by humans to almost all parts of the world. Notable predators, cats threaten native birdlife and other fauna, especially on islands where native species have evolved in relative isolation from predators.Common Names: cat, domestic cat, feral cat, Hauskatze, house cat, poti, pusiniveikau

Gambusia affinis is a small fish native to the fresh waters of the eastern and southern United States. It has become a pest in many waterways around the world following initial introductions early last century as a biological control agent for mosquitoes. In general, it is considered to be no more effective than native predators of mosquitoes. The highly predatory mosquito fish eats the eggs of economically desirable fish and preys on and endangers rare indigenous fish and invertebrate species. Mosquito fish are difficult to eliminate once established, so the best way to reduce their effects is to control their further spread. One of the main avenues of spread is continued, intentional release by mosquito-control agencies. G. affinis is closely related to he eastern mosquito fish (G. holbrooki), which was formerly classed as a sub-species. Their appearance, behaviour and impacts are almost identical, and they can therefore be treated the same when it comes to management techniques. Records of G. affinis in Australia actually refer to G. holbrooki.Common Names: Barkaleci, Dai to ue, Gambusia, Gambusie, Gambusino, Gambuzia, Gambuzia pospolita, Gambuzija, guayacon mosquito, Isdang canal, Kadayashi, Koboldkärpfling, Kounoupopsaro, live-bearing tooth-carp, Mosquito fish, Obyknovennaya gambuziya, pez mosquito, San hang ue, Silberkärpfling, tes, Texaskärpfling, Topminnow, western mosquitofish, Western mosquitofish

The small Indian mongoose (Herpestes auropunctatus) has been introduced to many islands worldwide for control of rats and snakes, mainly in tropical areas, but also to islands in the Adriatic Sea. Moreover, it has been introduced successfully in two continental areas: the northeast coast of South America and a Croatian peninsula. Mongooses are diurnal generalist carnivores that thrive in human-altered habitats. Predation by mongoose has had severe impacts on native biodiversity leading to the decline and extirpation of native mammals, birds, reptiles, and amphibians. At least seven species of native vertebrates, including mammals, birds, reptiles, and amphibians, have almost disappeared on Amami-oshima Island since the introduction of the mongoose in 1979. In addition, mongoose carries human and animal diseases, including rabies and human Leptospira bacterium.Common Names: beji, Kleiner Mungo, mangouste, mangus, mweyba, newla, small Indian mongoose

Oncorhynchus mykiss (rainbow trout) are one of the most widely introduced fish species in the world. Native to western North America, from Alaska to the Baja Peninsula, Oncorhynchus mykiss have been introduced to numerous countries for sport and commercial aquaculture. Oncorhynchus mykiss is highly valued as a sportfish, with regular stocking occurring in many locations where wild populations cannot support the pressure from anglers. Concerns have been raised about the effects of introduced trout in some areas, as they may affect native fish and invertebrates through predation and competition.Common Names: Alabalik, Alabalik türü, Amerikaniki Pestrofa, Aure, Baiser, Baja California rainbow trout, Brown trout, Coast angel trout, Coast rainbow trout, Coast range trout, Dagova pastarva, Forelle, Forel rajduzhna, Hardhead, Kamchatka steelhead, Kamchatka trout, Kamloops, Kamloops trout, Kirjolohi, K'wsech, Lord-fish, Masu, Nijimasu, Orret, Pastrva, Pestropha, Pstrag teczowy , Pstruh duhový, Pstruh dúhový, Rainbow trout, Rainbow trout , Redband, redband trout, Regenbogenforelle, Regenbogenforelle , Regenboogforel, Regnbåge, Regnbågslax, Regnbogasilungur, Regnbueørred, Regnbueørret, Salmones del Pacífico, Salmon trout, Silver trout, Stahlkopfforelle, Stålhovedørred, Steelhead, steelhead trout, Steelhead trout , Summer salmon, Sxew'k'em, Trofta ylberi, Trofte ylberi, Trota, Trota iridea, Trucha, trucha arco iris, Trucha arcoiris, Trucha arco iris , truite arc-en-ciel, Truta , Truta-arco-iris, Urriöi

Oreochromis mossambicus (Mozambique tilapia) has spread worldwide through introductions for aquaculture. Established populations of Oreochromis mossambicus in the wild are as a result of intentional release or escapes from fish farms. Oreochromis mossambicus is omnivorous and feeds on almost anything, from algae to insects.Common Names: blou kurper, common tilapia, fai chau chak ue, Java tilapia, kawasuzume, kurper bream, malea, mojarra, mosambik-maulbrüter, Mozambikskaya tilapiya, Mozambique cichlid, Mozambique mouth-breeder, Mozambique mouthbrooder, Mozambique tilapia, mphende, mujair, nkobue, tilapia, tilapia del Mozambique, tilapia du Mozambique, tilapia mossambica, tilapia mozámbica, trey tilapia khmao, weißkehlbarsch, wu-kuo yu

Pinus pinaster, originally from the Mediterranean Basin, has been planted in temperate regions within and outside its natural range for a wide range of reasons. It regenerates readily almost everywhere it is planted and in many places it invades natural shrubland, forest and grassland. Pinus pinaster forms dense thickets which supress native plants, changes fire regimes and hydrological properties and alters habitats for many animals.Common Names: cluster pine, maritime pine

A native of the Indian sub-continent, the ship rat (Rattus rattus) has now spread throughout the world. It is widespread in forest and woodlands as well as being able to live in and around buildings. It will feed on and damage almost any edible thing. The ship rat is most frequently identified with catastrophic declines of birds on islands. It is very agile and often frequents tree tops searching for food and nesting there in bunches of leaves and twigs.Common Names: black rat, blue rat, bush rat, European house rat, Hausratte, roof rat, ship rat

Sus scrofa (feral pigs) are escaped or released domestic animals which have been introduced to many parts of the world. They damage crops, stock and property, and transmit many diseases such as Leptospirosis and Foot and Mouth disease. Rooting pigs dig up large areas of native vegetation and spread weeds, disrupting ecological processes such as succession and species composition. Sus scrofa are omnivorous and their diet can include juvenile land tortoises, sea turtles, sea birds, endemic reptiles and macro-invertebrates. Management of Sus scrofa is complicated by the fact that complete eradication is often not acceptable to communities that value feral pigs for hunting and food.Common Names: kuhukuhu, kune-kune, petapeta, pig, poretere, razorback, te poaka, Wildschwein