God created this earth in a precisely balanced manner. All the species have got a particular place in the bio-diversity. But due to some of the unavoidable circumstances, some of the species are losing their battle of survival. They are no more able to reproduce in the proportion they are getting dead. There are millions of species of “living beings” family which are getting extinct day by day. I am introducing you to some of these species. See the some creatures description below and share your feelings over this topic.
Baiji River Dolphin
The Baiji is a freshwater dolphin found only in the Yangtze River in China. Nicknamed “Goddess of the Yangtze” in China, the dolphin is also called Chinese River Dolphin, Yangtze River Dolphin, Whitefin Dolphin and Yangtze Dolphin. It is not to be confused with the Chinese White Dolphin.
The Baiji population declined drastically in decades as China industrialized and made heavy use of the river for fishing, transportation, and hydroelectricity. Efforts were made to conserve the species, but a late 2006 expedition failed to find any Baiji in the river.
Organizers declared the Baiji “functionally extinct”, which would make it the first aquatic mammal species to become extinct since the demise of the Japanese Sea Lion and the Caribbean Monk Seal in the 1950s. It would also be the first recorded extinction of a well-studied cetacean species (it is unclear if some previously extinct varieties were species or subspecies) to be directly attributable to human influence.
In August 2007, a Chinese man reportedly videotaped a large white animal swimming in the Yangtze. Although Wang Kexiong of the Institute of Hydrobiology of the Chinese Academy of Sciences has tentatively confirmed that the animal on the video is probably a Baiji, the presence of only one or a few animals, particularly of advanced age, is not enough to save a functionally extinct species from true extinction. The last known living Baiji was Qi Qi , which died in 2002.
The Tecopa pupfish (Cyprinodon nevadensis calidae) is an extinct subspecies of the Amargosa pupfish (Cyprinodon nevadensis). The small, heat-tolerant pupfish was endemic to the outflows of a pair of hot springs in the Mojave Desert of California.
The fish were about 1–1.5 inches (2.5–4 cm) in length. The dorsal fin was positioned closer to the tail than the head. The pelvic fin was small or sometimes absent, and had six lepidotrichia. Similar to some other Cyprinodons, breeding males displayed a bright blue coloration. Females had between six and ten vertical stripes.
he Tecopa pupfish is member of the genus Cyprinodon (pupfish) of the family Cyprinodontidae (killifish). Most divergence of local Cyprinodon species likely took place during the early-to-mid Pleistocene, a time when pluvial lakes intermittently filled the now-desert region, though some may have occurred during the last 10,000 years. The evaporation of the lakes resulted in the geographic isolation of small Cyprinodon populations in remnant wetlands and the speciation of C. nevadensis.
Habitat modifications and the introduction of non-native species led to its extinction in about 1970.
Javan tigers were very small compared to other subspecies of the Asian mainland, but larger in size than Bali tigers. Males weighed between 100 and 140 kg (220 and 310 lb) on average with a body length of 200 to 245 cm (79 to 96 in). Females were smaller than males and weighed between 75 and 115 kg (170 and 250 lb) on average. Their nose was long and narrow, occipital plane remarkably narrow and carnassials relatively long. They usually had long and thin stripes, which were slightly more numerous than of the Sumatran tiger.
The smaller body size of Javan tigers is attributed to Bergmann’s rule and the size of the available prey species in Java, which are smaller than the cervid and bovid species distributed on the Asian mainland. However, the diameter of their tracks are larger than of Bengal tiger in Bangladesh, India and Nepal.
The Bubal Hartebeest (Alcelaphus buselaphus buselaphus) is classified as an extinct antelope. The statement that the antelope was extinct in 1923 has been refuted by Francis Harper.The Bubal still existed in 1925 in the region of Missour (eastern Morocco). It perhaps still lives in the south of Geryville (Algeria).
The name Hartebeest is a Dutch word (originally spelled hertebeest) which means deer. The Bubal Hartebeest stood at around 122 cm (4 ft) at the shoulder. It also had lyre-shaped horns.
The Bubal Hartebeest is believed to have once lived in Algeria, Egypt, Libya, Morocco and Tunisia. It may also have resided in the Middle East. The Hartebeest was once domesticated by Egyptians and may have been used as a sacrificial animal. Its horns in tombs at Abadiyeh indicated its importance as a food source and in mythology.
It is even mentioned in the Old Testament under the name Yachmur (1 Kings 4:23) . Starting in the 1900s the Bubal Hartebeest could only be found in Algeria and the Moroccan High Atlas. Many Hartebeests were captured and were kept alive (e.g. in the London Zoo from 1883 to 1907), but they eventually died out. In 1923, a Bubal Hartebeest female that died in a Paris Zoo is believed to have been that last one remaining. The ancient Egyptians had a hieroglyph meaning “baby hartebeest”:
The diet of the Pyrenean Ibex consisted of grass, herbs and lichens. The ibex was paraxonic, with the plane of symmetry of each foot passing between the third and fourth digits. The third and fourth digits were quite large and bore most of the weight.
The subspecies once ranged across the Pyrenees in France and Spain and the surrounding area, including the Basque Country, Navarre, north Aragon and north Catalonia. A few hundred years ago they were numerous, but by 1900 their numbers had fallen to fewer than 100. From 1910 onwards, their numbers never rose above 40, and the subspecies was found only in a small part of Ordesa National Park, in Huesca.
The last natural Pyrenean Ibex, a female named Celia, was found dead on January 6, 2000, next to a falling tree. Although her cause of death is known, the reason for the extinction of the subspecies as a whole is a mystery. Some hypotheses include the inability to compete with other species for food, infections and diseases, and poaching.
The Pyrenean Ibex became the first taxon ever to become “un-extinct”, for a period of seven minutes in January 2009, when a cloned female Ibex was born alive and survived a short time, before dying from lung defects.