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Line of Inquiry 1: Endangered Animals around the world and through time.

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Line of Inquiry 1: Endangered Animals around the world and through time.

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When is a specie considered in endanger of extinction?

An animal is considered endangered when very few of its species remain and they are at risk of disappearing.

https://www.nationalgeographicla.com/animales/2019/01/cuando-una-especie-esta-en-peligro-de-extincion

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¿Cuándo una especie está en peligro de extinción? | National Geographic

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Una especie podrá clasificarse como amenazada, es decir, en peligro de extinción, según la definición que se considere. La Lista Roja de especies amenazadas de la IUCN (Unión Internacional para la Conservación de la Naturaleza) determina que un animal está en peligro de extinción cuando la cantidad de ejemplares en la naturaleza ha descendido tanto que se encuentra en “riesgo de extinción extremadamente alto”.

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What animals are endangered?

 Critically Endangered (very close to extinction in the world):

Vaquita (Mexico)

Chinese pangolin (south China)

Japanese and Sumatran rhinoceros (north Japan)

Amur leopard (Oriente ruso)

Gorillas and orangutans (Asia and Africa)

Angel shark (Europe)

Gangetic dolphin (India)

Borneo elephant (Southeast Asia)

Southern pudu (Chile)

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An endangered species is a type of organism that is threatened by extinction. Species become endangered for two main reasons: loss of habitat and loss of genetic variation.

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https://cnnespanol.cnn.com/2022/07/17/especies-animales-que-estan-en-peligro-critico-de-extincion-orix

WHAT IS AN ENDAGERED ANIMAL?

The Sumatran tiger The African forest elephant The Amur leopard The Bornean orangutan The hawksbill turtle The Javan rhinoceros The orangutanThe Sumatran elephant The Sumatran rhinoceros The Sumatran tiger The vaquita

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Las 17 especies animales que están en peligro crítico de extinción | CNN

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La vaquita marina forma parte de una lista de especies en “peligro crítico” —que enfrentan un riesgo extremadamente alto de extinción— del Fondo Mundial para la Naturaleza (WWF, por sus siglas en español).

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Endangered animals around the world and through time.

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What is an endangered animal?

Endangered animals are species that are at risk of disappearing due to a range of human actions and environmental shifts. Key reasons for their decline include the destruction of natural habitats, excessive hunting, pollution, the introduction of non-native species, and changes in climate.

https://fixanswer.com/what-will-happen-in-a-world-without-animals/

Endangered Species

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This line of inquiry is about WHAT animals are in danger of extinction around the world? not the causes.

You might explore by continents, for example.

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WHAT ARE SOME ANIMALS IN DANGER OF EXTINCTION?

some animals in danger of extinction are:

axolotls: there are between 50 and 1,000 axolotls in the world.

polar bear: there are between 22,000 and 32,000.

sea cow: there are only between 6 and 9 of them in the world.

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The one up here is the Melomys Rubicola 

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Animals that have extinct:

smooth hand fish: Have not been seen since the beginning of 2000.

Pinta Giant Tortoise: In 2008 they detected that the oviparous eggs were not growing, they did what they could to revive it but they could not.

Melomys Rubicola: Was last seen in 2009.

5 animales extintos: conoce sus características y las causas de su desaparición | National Geographic

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A species is considered at risk of extinction when there is a sudden and rapid decline in its population or loss of its habitat.

https://www.britannica.com/science/endangered-species

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endangered species, any species that is at risk of extinction because of a sudden rapid decrease in its population or a loss of its critical habitat. Biodiverse regions that require protection on the grounds that they host a significant number of endangered species are called hot spots.
(Read E.O. Wilson's Britannica essay on mass extinction.)
Previously, any species of plant or animal that was threatened with extinction could be called an endangered species. The need for separate definitions of "endangered" and " threatened" species resulted in the development of various categorization systems, each containing definitions and criteria by which a species can be classified according to its risk of extinction. As a rule, a range of criteria must be analyzed before a species can be placed in one category or another.

Often such categorization systems are linked directly to national legislation, such as the United States Endangered Species Act (ESA) or the Canadian Species at Risk Act (SARA). In addition, regional agreements, such as the European Union's Habitats Directive (Council Directive 92/43/EEC), and international conservation agreements, such as the Convention on the Conservation of Migratory Species of Wild Animals (CMS) or the Convention on International Trade in Endangered Species of Wild Fauna and Flora (CITES), are connected to species- assessment systems. One of the most-recognized independent international systems of species assessment is the Red List of Threatened Species, created by the International Union for Conservation of Nature (IUCN).

Human beings and endangered species

Roughly 99 percent of threatened species are at risk because of human activities alone. By the early 21st century it could be said that human beings ( Homo sapiens) are the greatest threat to biodiversity and are the major drivers of biodiversity loss. The principal threats to species in the wild are:

Although some of these hazards occur naturally, most are caused by human beings and their economic and cultural activities. The most pervasive of these threats is habitat loss and degradation-that is, the large-scale conversion of land in previously undisturbed areas driven by the growing demand for commercial agriculture, logging, and infrastructure development. Because the rates of loss are highest in some of the most biologically diverse regions on Earth, a perpetual battle is waged to manage destructive activities there while limiting the impact that such restrictions may have on the well-being of local communities. The relative importance of each threat differs within and among taxa. So far, incidental mortality from ecological disturbance, temporary or limited human disturbance, and persecution have caused limited reductions in the total number of species; however, these phenomena can be serious for some susceptible groups. In addition, global warming has emerged as a widespread threat, and much research is being conducted to identify its potential effects on specific species, populations, and ecosystems.

Conflicts between human activities and conservation are at the root of many of these phenomena. Such controversies are often highly politicized and widely publicized in the global press and through social media. For example, habitat loss and species loss have resulted from the unregulated exploitation of coltan (the rare ore for tantalum used in consumer electronics products such as mobile phones and computers) in Kahuzi-Beiga National Park, one of the Democratic Republic of the Congo's premier forest parks. The park is also home to much of the population of the threatened Eastern Lowland gorilla ( Gorilla beringei graueri). Mining has increased gorilla mortality by reducing the animal's food resources and leading many people displaced by the mining to kill gorillas for their meat. In addition, the mountain gorilla ( G. beringei beringei), a close relative of the Eastern Lowland gorilla, is also at risk of extinction. However, authorities cite poaching, disease, and crossfire between warring political groups in the vicinity of Virunga National Park as the primary sources of its population decline.

Another example of a widely publicized wildlife controversy involves the relatively recent declines in amphibian populations. Known to be important global indicators of environmental health, amphibians have experienced some of the most serious population declines to date of all groups that have been assessed globally through the IUCN Red List process ( see below). Amphibians (a group that includes salamanders, frogs, toads, and caecilians [wormlike amphibians]), being particularly sensitive to environmental changes, are severely threatened by habitat destruction, pollution, the spread of a disease called amphibian chytridiomycosis, and climate change.

Beyond these notable examples, many of the world's birds are also at risk. The populations of some bird species (such as some albatrosses, petrels, and penguins) are declining because of longline fishing, whereas those of others (such as certain cranes, rails, parrots, pheasants, and pigeons) have become victims of habitat destruction. On many Pacific islands, the accidental introduction of the brown tree snake ( Boiga irregularis) has wreaked havoc on many bird populations.

Many fishes and other forms of aquatic and marine life are also threatened. Among them are long-lived species that have life history strategies requiring many years to reach sexual maturity. As a result, they are particularly susceptible to exploitation. The meat and fins of many sharks, rays, chimaeras, and whales fetch high prices in many parts of the world, which has resulted in the unsustainable harvest of several of those species.

Moreover, freshwater habitats worldwide are progressively threatened by pollution from industry, agriculture, and human settlements. Additional threats to freshwater ecosystems include introduced invasive species (such as the sea lamprey [ Petromyzon marinus] in the Great Lakes), the canalization of rivers (such as in the streams that empty into the Everglades in Florida), and the overharvesting of freshwater species (as in the case of the extinct Yunnan box turtle [ Cuora yunnanensis] in China). While an estimated 45,000 described species rely on freshwater habitats, it is important to note that humans are also seriously affected by the degradation of freshwater species and ecosystems.

Against this backdrop of threats related to urban expansion and food production, the unsustainable harvest of animal and plant products for traditional medicine and the pet trade is a growing concern in many parts of the world. These activities have implications for local ecosystems and habitats by exacerbating population declines through overharvesting. In addition, they have cross-border repercussions in terms of trade and illegal trafficking.

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Endangered species | Definition, Causes, Examples, & Facts

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Endangered species, any species that is at risk of extinction because of a sudden rapid decrease in its population or a loss of its critical habitat. Previously, any species of plant or animal that was threatened with extinction could be called an endangered species.

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https://www.britannica.com/science/conservation-ecology/Which-species-are-most-vulnerable-to-extinction

What is an endangered animals?

Before a species becomes extinct, it must first be rare. Some species are naturally rare, while others have that rarity imposed upon them by one or more of the factors discussed above. Some species are much more vulnerable than others to becoming dangerously rare, and other species, when rare, are more likely than others of equal rarity to succumb.

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Conservation - Endangered, Threats, Species | Britannica

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Conservation - Endangered, Threats, Species: Before a species becomes extinct, it must first be rare. Some species are naturally rare, while others have that rarity imposed upon them by one or more of the factors discussed above.

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Endangered animals have existed across the world and throughout history. Many species from various regions and times faced threats, some due to natural changes, but most because of human activities like hunting, habitat loss, and pollution.

IUCN Red List of Threatened Species

International Fund for Animal Welfare | IFAW

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20 Species That Went Extinct in the Last 100 Years

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Over the last century, human activities have accelerated the rate of extinction, leading to the irreversible loss of diverse species.

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Over time and across the globe, numerous animals have faced extinction or endangerment, ranging from ancient creatures like mammoths and dodos to current species such as rhinos, orangutans, and sea turtles.

Species List | Endangered, Vulnerable, and Threatened Animals | WWF

16 of the world’s most endangered animals

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10 of the world's most endangered animals

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As our modern society gets more resource-intensive, natural spaces are shrinking, wildlife numbers are declining, and species are still endangered.

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WHAT IS AN ENDANGERED ANIMAL?

An animal can be an insect, or any number of other life forms on this planet (including humans). Altogether we call this range of life ‘biodiversity.’

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A specie is considered endangered when its population has declined by between 50% and 70%. This decline is measured over 10 years or three generations of the species.

Endangered Species

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An endangered species is a type of organism that is threatened by extinction. Species become endangered for two main reasons: loss of habitat and loss of genetic variation.

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species that are recovering from extinction:

Black-footed ferret: For the past 30 years they have cared for and raised these mischievous and elusive little ones.

Black rhinoceros: Its population is expected to increase by more than 11%. This change in status comes in parallel with an encouraging trend for all black rhinos in Africa in 2012.

Humpback whale: An increase of 50% of these populations is estimated.

Ocho especies que se están recuperando | Historias | Descubre WWF

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Established in 1964, the International Union for Conservation of Nature's Red List of Threatened Species has evolved to become the world's most comprehensive source of information on the global conservation status of animal, fungal, and plant species.

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Established in 1964, the IUCN Red List of Threatened Species has evolved to become the world’s most comprehensive information source on the global conservation status of animal, fungi and plant species.

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