A species is defined as endangered or threatened when it is suffers from these factors: damage to its habitat for recreational, or entertainment purposes; disease or predation of the species; and hazards to the continued life of the species.
A species is declared extinct after many years of not being spotted. Because it takes so long to define an entire species as extinct, it is probable that there are many species already gone that we are unaware of.
At the present time, there are 1,556 endangered species on the whole.
- Amphibians | 41%
Mammals | 25%
Vertebrates | 13% (not including aquatic fish)
Conifers | 30%
Birds | 13%
Reef-building Corals | 33%
According to investigators, 40 per cent of entire species dwelling on this planet are facing high risk of extinction. As many as 30 to 50 percent of all species are possibly heading toward extinction by mid-century.
99% of currently threatened species are at risk from human activities, primarily those driving habitat loss, introduction of exotic species, and global warming.
As per conservationist, almost 7% to 18% of plant species, animals and fungi are endangered in USA, which is significantly higher than the list of known species that are protected within the Endangered Species Act in the United States.
Freshwater ecosystems are home to more than 100,000 known species of plants and animals, and are now one of the most endangered habitats in the world as a result of human development, pollution, and climate change.
Almost 85% of the endangered species in USA is caused due to the loss of habitat and thus it’s the most important cause of decline.
The second most important factor that is driving animals near to extinction is pollution, climatic change and disease.
Noise pollution is also a kind of pollution that sometimes disrupts the behavior of animals.
At times when you introduce new species of animals, they can also disturb the existing ones through bringing in various kinds of diseases.