Question 2 of 21

After a species is taken off of the endangered list because it is considered recovered, how long is it monitored by the U.S. Fish and Wildlife Service?

... A species is watched for five years to determine if it is doing well without the protection of the Endangered Species Act.

Question 3 of 21

In 2010, a tiger summit was organized by the prime minister of _________.

... Russia hosted a meeting to discuss saving the six remaining species of tiger. Wild tigers still live in 13 countries, and each of these nations pledged to double its tiger population.

Question 4 of 21

The bald eagle was taken off the threatened and endangered species list in 2007. In 1963, there were only about 400 nesting pairs in the contiguous U.S., primarily due to _______.

... The pesticide DDT interfered with the development of eagles' eggs, decimating the population, and its use was banned in the U.S. in 1972. As of 2007, the number of nesting pairs had increased to 10,000.

Question 5 of 21

What percentage of species covered by the 1973 Endangered Species Act has since been taken off the list?

... One percent of species have recovered.

Question 6 of 21

Which species of rhinoceros, once considered extinct, is now doing well in wildlife refuges?

... The southern white rhino, though endangered, has greater numbers than any other variety. The black rhino population is also increasing in sanctuaries, but the numbers remain very small.

Question 7 of 21

The number of Hispaniolan solenodons (an animal resembling a combination of rat and shrew) is dwindling in the Dominican Republic. They are unique mammals because they can transmit venom through their _______.

... The solenodon injects venom through its teeth. Though they have been around, relatively unchanged, for 76 million years, they are currently endangered.

Question 8 of 21

In 2011, which species of wolf was taken off the endangered species list in the Rocky Mountain region?

... The population of 1,300 gray wolves was removed from the list. This means the wolves could again be hunted in parts of Idaho, Montana, Utah, Oregon and Washington.

Question 9 of 21

A species can be removed from the endangered or threatened species list because ___________.

... Removal from the list can come for all of the reasons we list here. Species can be struck from the list because they are surviving better, because they have disappeared completely or because new populations of the animal have been discovered.

Question 10 of 21

In 2009, the once-endangered brown pelican was delisted. Previously, it had been hunted for ____________.

... In addition to being hunted for its feathers, the brown pelican was endangered because of habitat loss and the effects of DDT on its egg shells.

Question 11 of 21

In 2011, America saw the first short-tailed albatross chick born in many years. It hatched in _________.

... The chick was born on an island in the Midway Atoll in the northwestern Pacific Ocean, near Hawaii.

Question 12 of 21

The wild horse is no longer considered extinct in the wild. In 2008 it was upgraded to critically endangered due to reintroduction efforts in ___________.

... Beginning in the early 1990s, wild horses were brought back into Mongolia.

Question 13 of 21

Which area is often referred to as the "Endangered Species Capital of the World"?

... Because the Hawaiian Islands are so isolated, thousands of species have evolved there and never spread anywhere else. For example, the tiny Oahu tree snails are endangered; they are found only on two island volcanoes.

Question 14 of 21

Which of the following threats is NOT a factor that is considered by the U.S. Fish and Wildlife Service when contemplating the delisting of a species?

... The issues for delisting are similar to those for listing. Disease, loss of habitat and the prevalence of natural predators are all factors to weigh. Political fallout from the delisting is, however, not considered.

Question 15 of 21

The most endangered big cat in North America, the _______, is being reintroduced.

... The Florida panther is being brought back to the Everglades, in the southern part of the state.

Question 16 of 21

As of May 2012, what percentage of plants and animals included in the U.S. Endangered Species Act is on track to meet recovery goals?

... Around 90 percent -- almost 100 of the 110 species covered by the act -- are doing well in recovery, including the Canada goose, whooping crane and Florida manatee. Success stories are developing in every state of the union.

Question 17 of 21

The San Miguel Island fox lives off the coast of southern California. Though recovering, this species was first endangered because of a problem with _________.

... As the bald eagles died off in the Channel Islands due to DDT contamination, they were replaced by golden eagles. While the balds ate marine animals, the goldens fed on land creatures. The foxes were unfamiliar with predators of this type and were easy prey.

Question 18 of 21

Contaminants in the water off the U.S. west coast may be harming recovery efforts for the sea otter by __________.

... At one point, the sea otter population had increased to 2,500, but infectious diseases, preying on weakened immune systems, have been killing many otters of breeding age.

Question 19 of 21

Although listed as threatened in 1999, the Lake Erie water snake was delisted in 2011 because its population had grown to almost 10,000. Its numbers had originally diminished primarily due to __________.

... This water snake lives on small islands in Lake Erie. Although non-venomous, a tremendous number of them were killed by humans, who feared or disliked the reptiles and saw them as pests.

Question 20 of 21

Within the continental U.S., grizzly bears have been killed in large numbers. They are now gone from ______ percent of their historic roaming range.

... Grizzly bears have been killed off in 98 percent of their original range, due to protection of grazing livestock, mining, road building and hunting. Conservation efforts are underway, though, and grizzly bears in the Yellowstone National Park area have been taken off the threatened list.

Question 21 of 21

The California condor population has increased from a few dozen to more than 100. The condor is a type of ________.

... With the distinction of being the largest flier in North America, the California condor is a type of vulture, eating large carrion such as cattle and deer.

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