Why are many species of animals and birds getting extinct answer?

(i) Animals and birds extinction may be caused by natural occurrences such as climatic heating or cooling or changes in sea levels. (ii) Habitat destruction as farming land expands and forests are cut-down. This is the main cause along with pollution and over fishing or hunting.

Why are many species of animals getting extinct?

Species become endangered for two main reasons: loss of habitat and loss of genetic variation. A loss of habitat can happen naturally. Human activity can also contribute to a loss of habitat. Development for housing, industry, and agriculture reduces the habitat of native organisms.

What causes birds to become extinct?

Hunting was the main cause of extinction for larger species, while predation by introduced predators was the main reason we have lost so many smaller species. They were large birds, equal in size to the smaller moa species, and are likely to have been predators and scavengers.

Why are many species of animals?

Habitat destruction as farming land expands and forests are cut-down is the main cause of modern extinctions, along with pollution, the introduction of alien species, and over fishing or hunting. Increasingly, however, climate change is thought to be driving extinctions.

Why did the huge animals like dinosaur become extinct?

A big meteorite crashed into Earth, changing the climatic conditions so dramatically that dinosaurs could not survive. Ash and gas spewing from volcanoes suffocated many of the dinosaurs. Diseases wiped out entire populations of dinosaurs. Food chain imbalances lead to the starvation of the dinosaurs.

What will happen if birds become extinct?

This impact would be magnified hugely by the absence of our wild birds; the consumption of insects by birds being necessary to keep these insects in check. And, ultimately, there would be a vast increase in the numbers of spiders, worms, and other such insectivores that would otherwise be consumed by birds.

What would happen if all birds become extinct?

By having more insects roaming the land as a result of no birds, crops will be ravaged by the amount of pests. Many species of plants depend on birds to pollinate flowers, spread seed and eat pests.

How many species of animals are extinct?

Summary. Extinctions have been a natural part of our planet’s evolutionary history. More than 99\% of the four billion species that have evolved on Earth are now gone. At least 900 species have gone extinct in the last five centuries.

Why is it important that bird animal and plant species be preserved?

The Endangered Species Act is very important because it saves our native fish, plants, and other wildlife from going extinct. From providing cures to deadly diseases to maintaining natural ecosystems and improving overall quality of life, the benefits of preserving threatened and endangered species are invaluable.

Why did dinosaurs become extinct Quora?

It seems that dinosaurs went extinct because of the impact of a comet or asteroid on the Earth. Dust blocked out the sun for a time, making survival harder, and plants were destroyed by fires. Plant eaters couldn’t get enough food, so they died. Meat eaters couldn’t get enough plant eaters, so they died.

Why are so many animals going extinct?

Most species of animals going extinct (animals=mammals, reptiles, birds, amphibians, insects, ect..) are losing their habitat to do the overcrowding of humans. Some are losing their habitat due to climate change, which has been accelerated by human activity.

What are the three main causes of animal extinction?

The three main reasons for animals becoming extinct is meteor and comet strikes, climate change, and habitat loss. All of us must play our part to ensure no more species are lost. What causes animal extinction, and is there a way in modern times that species extinction can be prevented?

Can a single environmental disaster cause a species to go extinct?

While it’s virtually unknown for a single environmental disaster (such as an oil spill or fracking project) to render an entire species extinct, constant exposure to pollution can render plants and animals more susceptible to the other dangers, including starvation, loss of habitat, and disease.

Are birds facing extinction in North America?

There are hundreds of species of birds native to North America facing extinction due to loss of resources. One bird feeder can provide nourishment for hundreds of animals in your neighborhood. If you have a birdbath in your garden, make sure to disinfect it once a month as many diseases can be transmitted via stagnant water.