Although there is an incredible variety of wildlife in the natural world, some species are so uncommon that only a select few will ever get to see them. Since these elusive animals frequently live in isolated or protected areas, seeing them is both difficult and a tribute to the richness of the earth. Seeing the habitats of these endangered creatures is a unique and enriching experience for the adventurous tourist who has a passion for wildlife. These are seven of the rarest species in the world, along with the unique locations where you may be able to see them.

　　Javan Rhinoceros – Ujung Kulon National Park, Indonesia

　　With an estimated population of only 74, the Javan rhinoceros (Rhinoceros sondaicus) is one of the planet's most endangered big mammals. Only Ujung Kulon National Park, which is situated at the western tip of Java, Indonesia, is home to these lonesome animals. The park's freshwater streams and thick lowland rainforests offer the rhinos a perfect haven. In addition to exploring verdant jungles and immaculate beaches, a trip to Ujung Kulon gives the remote chance to see these magnificent creatures in their native environment. Although sightings are extremely rare because of their dangerously low numbers and the deep jungle they live in, the sensation of travelling through their last sanctuary is unmatched.

　　Gilbert's Potoroo – Two Peoples Bay Nature Reserve, Australia

　　In 1994, the Gilbert's potoroo (Potorous gilbertii), which had been believed to be extinct, was found again in Western Australia's Two Peoples Bay Nature Reserve. With a population of only 100, this marsupial is the rarest in the world, and conservation efforts have been essential to its survival. Visitors are treated to a stunning backdrop of the reserve's rocky granite headlands, sandy beaches, and extensive heathland. Although it is unlikely to view the nocturnal and elusive potoroo, the reserve provides opportunities to take in its natural beauty and observe other native wildlife.

　　Spade-Toothed Whale – South Pacific Ocean

　　With only six documented specimens, all of which are found in the South Pacific, the spade-toothed whale (Mesoplodon traversii) is the rarest and least understood among the beaked whales. Encounters are almost nonexistent because of its elusiveness and deep-ocean habitat. Marine lovers can, however, travel to places like the Kaikoura coast of New Zealand, which is well-known for whale viewing. Although seeing a spade-toothed whale is unlikely, cetacean enthusiasts should still visit because of the abundant marine life, which includes humpbacks, orcas, and sperm whales.

　　Vaquita – Gulf of California, Mexico

　　With less than ten individuals left, the vaquita (Phocoena sinus) is the smallest and most endangered marine animal in the world. This timid porpoise, which is native to the Gulf of California in Mexico, is endangered by illicit gillnet fishing. Although sightings are extremely rare, conservationists are working to safeguard the remaining population. Visitors may explore the Gulf's thriving marine ecosystems, which are home to a variety of marine species and breathtaking coastal scenery, and support regional ecotourism projects.

　　Northern Bald Ibis – Souss-Massa National Park, Morocco

　　Once common throughout the Middle East, northern Africa, and Europe, the northern bald ibis (Geronticus eremita) is now found in isolated populations. Morocco's Souss-Massa National Park is home to one of the last remaining natural colonies. These unique birds, which are distinguished by their bald heads and curled bills, nest on the park's semi-arid environments, cliffs, and riverbanks. Birdwatchers can study the ibises, particularly during mating seasons, and enjoy the park's varied avian life by travelling to Souss-Massa.

　　Amur Leopard – Russian Far East

　　There are just about 120 Amur leopards (Panthera pardus orientalis) left in the wild, making them the rarest big cat in the world. These lone cats, which live in the Russian Far East's temperate forests, especially in the Land of the Leopard National Park, are acclimated to harsh environments and frigid temperatures. Along with the Amur leopard, Siberian tigers and other species can be found in the park's rocky terrain, river basins, and mixed woods. Although sightings are uncommon because of the leopard's elusiveness, guided trips provide an opportunity to explore this pristine and inaccessible area and provide insights into ongoing conservation efforts.

　　Kakapo – Codfish Island and Anchor Island, New Zealand

　　With only 200 individuals, the kakapo (Strigops habroptilus), a flightless parrot native to New Zealand, is critically endangered. These nocturnal birds have been moved by conservation efforts to sanctuaries like Anchor Island and Codfish Island (Whenua Hou), which are devoid of predators. To preserve the kakapo, access to these islands is limited; however, for conservation enthusiasts, the New Zealand Department of Conservation periodically provides guided trips. You can also learn more about the kakapo and New Zealand's distinctive birds by visiting other sanctuaries on the mainland.