LOS ANGELES — The mountain lion P-22, who lived in the heart of Los Angeles for more than a decade and became the face of an international campaign to save California’s threatened puma population, was “compassionately euthanized” Saturday morning, according to the California Department of Fish & Wildlife’s director, because of the serious injuries he suffered earlier this week.
P-22 was thought to be about 12 years old.
Los Angeles’ most famous mountain lion, known for roaming across freeways and making a sprawling urban park his home, was captured Monday by wildlife officials after he killed a dog that was being walked in the Hollywood Hills, according to the Associated Press.
U.S. National Park Service, via AP
This photo provided by the U.S. National Park Service shows the mountain lion known as P-22, photographed in November 2014 in the Griffith Park area near downtown Los Angeles.
Wildlife biologists with the National Park Service and the state’s wildlife department captured the mountain lion after he began to exhibit increasing “signs of distress,” including three attacks on dogs in a month and several near-miss encounters with people. Scientists tracked the big cat to a Los Feliz, Calif., back yard, where he may have been lying low after being hit by a car.
A series of health exams showed that P-22 was significantly underweight, with a thinning coat and damage to his right eye, possibly from being hit by a car. A local animal control department had received a call reporting a vehicle collision with a mountain lion, and P-22’s radio collar placed him near the intersection where the crash was reported, officials said.
The mountain lion was not healthy enough to be released back to Griffith Park, state wildlife officials said. Advocates, scientists and residents had harbored hopes that the beloved animal would be healthy enough to retire to a nature preserve.
P-22 surprised the world in 2012 when his fluffy hindquarters and black-tipped tail appeared on a photograph snapped by a motion-sensing camera in Griffith Park. The adolescent cat had made an improbable trek to Griffith Park from his likely birthplace in the Santa Monica Mountains, journeying through the Hollywood Hills and across freeways.
The big cat became a bona fide celebrity, appearing in a glossy National Geographic feature that showed the mountain lion prowling past the Hollywood sign at night, muscles rippling under his tawny fur.
Scientists assumed the apex predator would move on in search of a mate and more space to roam. Instead, the wayward cat stayed in Los Feliz for more than 10 years, feasting on mule deer and raccoons and occasionally appearing on video doorbell cameras on quiet streets near the park. The cat lived alone and, as far as scientists can tell, never mated.
Catching a glimpse of P-22 on a nighttime prowl became one of the most coveted celebrity sightings in Los Angeles.
Like many cougars, which are sometimes called “ghost cats,” P-22 was shy by nature. For years, he preferred the park’s dark canyons and hillsides — and, sometimes, a darkened city sidewalk — to populated areas. But he had recently started to venture deeper into L.A.
Those forays coincided with an increase in run-ins with humans, including attacking three dogs in the span of a month, and chasing a man and his dog back up a set of steps and into their house, wildlife officials said.
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25 endangered animals that live only in America
US Forest Service // Flickr
The Endangered Species Act is a landmark conservation law that has brought wildlife threatened by habitat destruction, climate change, and other issues back from the brink of extinction—the iconic Bald Eagle is one of the most well-known examples.
In 2019, the Trump Administration rolled back several major protections outlined in the Endangered Species Act. These changes included banning blanket protections for newly threatened species and allowing cost to be a consideration when evaluating what it would take to save at-risk species. While in office, Trump took more than 100 legislative actions favoring business over the environment. In July 2022, U.S. District Judge Jon Tigar, presiding in Northern California, threw out the Trump-era changes, restoring critical protection for threatened species.
More than 1,300 species in the U.S. are listed as either endangered or threatened under the Endangered Species Act. Some of these animals are found nowhere else in the world. Stacker compiled a list of 25 endangered animals that are only found in the United States using the 2022 International Union for Conservation of Nature Red List and the U.S. Fish and Wildlife Service Endangered Species list.
All animals on this list are classified as either Endangered or Critically Endangered by the IUCN, and classified as either Endangered or Threatened by the federal government. While the U.S. Fish and Wildlife Service identifies critical habitats and provides legal protections for endangered species, the IUCN helps raise global awareness through data collection, analysis, fieldwork, advocacy, and fundraising.
US Forest Service // Flickr
The Endangered Species Act is a landmark conservation law that has brought wildlife threatened by habitat destruction, climate change, and other issues back from the brink of extinction—the iconic Bald Eagle is one of the most well-known examples.
In 2019, the Trump Administration rolled back several major protections outlined in the Endangered Species Act. These changes included banning blanket protections for newly threatened species and allowing cost to be a consideration when evaluating what it would take to save at-risk species. While in office, Trump took more than 100 legislative actions favoring business over the environment. In July 2022, U.S. District Judge Jon Tigar, presiding in Northern California, threw out the Trump-era changes, restoring critical protection for threatened species.
More than 1,300 species in the U.S. are listed as either endangered or threatened under the Endangered Species Act. Some of these animals are found nowhere else in the world. Stacker compiled a list of 25 endangered animals that are only found in the United States using the 2022 International Union for Conservation of Nature Red List and the U.S. Fish and Wildlife Service Endangered Species list.
All animals on this list are classified as either Endangered or Critically Endangered by the IUCN, and classified as either Endangered or Threatened by the federal government. While the U.S. Fish and Wildlife Service identifies critical habitats and provides legal protections for endangered species, the IUCN helps raise global awareness through data collection, analysis, fieldwork, advocacy, and fundraising.
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25 endangered animals that live only in America
USFWS // Flickr
- Scientific name: Reithrodontomys raviventris
- Red List status: Endangered
- Geographic range: California
The salt marsh harvest mouse was found around the Bay Area until relatively recently, but its habitat has become extremely fragmented. Because of human development, populations of the mouse are isolated from one another and cannot breed properly.
USFWS // Flickr
- Scientific name: Reithrodontomys raviventris
- Red List status: Endangered
- Geographic range: California
The salt marsh harvest mouse was found around the Bay Area until relatively recently, but its habitat has become extremely fragmented. Because of human development, populations of the mouse are isolated from one another and cannot breed properly.
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25 endangered animals that live only in America
Bernd Thaller // Flickr
- Scientific name: Cynomys parvidens
- Red List status: Endangered
- Geographic range: Utah
The Utah prairie dog was declared endangered in 1973. However, over the last 30 years, the population has been stable to increasing, and the species is now federally recognized as threatened rather than endangered. Threats like urban expansion, climate change, and resource exploration remain, but the prairie dog has recovered strongly.
Bernd Thaller // Flickr
- Scientific name: Cynomys parvidens
- Red List status: Endangered
- Geographic range: Utah
The Utah prairie dog was declared endangered in 1973. However, over the last 30 years, the population has been stable to increasing, and the species is now federally recognized as threatened rather than endangered. Threats like urban expansion, climate change, and resource exploration remain, but the prairie dog has recovered strongly.
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25 endangered animals that live only in America
LaggedOnUser // Wikimedia Commons
- Scientific name: Canis rufus
- Red List status: Critically endangered
- Geographic range: North Carolina
Red wolves were once found along much of the Southeast, but habitat destruction, hunting, and urban encroachment have dwindled their range to the point that they are only found in North Carolina. They're one of the most endangered canids on Earth. Red wolves are also highly endangered because of interactions with coyotes, which can hurt the species' long-term viability.
LaggedOnUser // Wikimedia Commons
- Scientific name: Canis rufus
- Red List status: Critically endangered
- Geographic range: North Carolina
Red wolves were once found along much of the Southeast, but habitat destruction, hunting, and urban encroachment have dwindled their range to the point that they are only found in North Carolina. They're one of the most endangered canids on Earth. Red wolves are also highly endangered because of interactions with coyotes, which can hurt the species' long-term viability.
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25 endangered animals that live only in America
Gordon Smith // Wikimedia Commons
- Scientific name: Adelocosa anops
- Red List status: Endangered
- Geographic range: Hawaii
The Kauai cave wolf spider is a highly unusual spider that can only be found in caves in the Koloa district of Kauai, Hawaii. Wolf spiders usually utilize their vision rather than webs to catch their prey, but the Kauai cave wolf spider is unique because it is eyeless, relying only on swift motion to hunt. Because they have such specific habitat needs, the cave wolf is highly vulnerable to habitat destruction from construction, human visitation, and other sources.
Gordon Smith // Wikimedia Commons
- Scientific name: Adelocosa anops
- Red List status: Endangered
- Geographic range: Hawaii
The Kauai cave wolf spider is a highly unusual spider that can only be found in caves in the Koloa district of Kauai, Hawaii. Wolf spiders usually utilize their vision rather than webs to catch their prey, but the Kauai cave wolf spider is unique because it is eyeless, relying only on swift motion to hunt. Because they have such specific habitat needs, the cave wolf is highly vulnerable to habitat destruction from construction, human visitation, and other sources.
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25 endangered animals that live only in America
U.S. Fish and Wildlife Service
- Scientific name: Anas laysanensis
- Red List status: Critically endangered
- Geographic range: Hawaii
Ducks don't immediately come to mind when we consider an endangered species, but this particular one is. The Laysan duck, once found all over the Hawaiian islands, now has a population only found on Laysan Island and on a wildlife refuge at Midway Atoll.
U.S. Fish and Wildlife Service
- Scientific name: Anas laysanensis
- Red List status: Critically endangered
- Geographic range: Hawaii
Ducks don't immediately come to mind when we consider an endangered species, but this particular one is. The Laysan duck, once found all over the Hawaiian islands, now has a population only found on Laysan Island and on a wildlife refuge at Midway Atoll.
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25 endangered animals that live only in America
USFWS // Flickr
- Scientific name: Anaxyrus canorus
- Red List status: Endangered
- Geographic range: California
The Yosemite toad, endemic to the Sierra Nevada Mountains in Northern California, is covered in warts; the females also have splotches all over their bodies. This species of toad walks rather than hops. They are particularly vulnerable to habitat destruction and are estimated to survive in only 50% of the species' historically known habitats.
USFWS // Flickr
- Scientific name: Anaxyrus canorus
- Red List status: Endangered
- Geographic range: California
The Yosemite toad, endemic to the Sierra Nevada Mountains in Northern California, is covered in warts; the females also have splotches all over their bodies. This species of toad walks rather than hops. They are particularly vulnerable to habitat destruction and are estimated to survive in only 50% of the species' historically known habitats.
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25 endangered animals that live only in America
Larry Lamsa // Flickr
- Scientific name: Centrocercus minimus
- Red List status: Endangered
- Geographic range: Colorado, Utah
The Gunnison sage-grouse is an unusual species of bird found only in the Southwest. They face threats from a variety of sources, but their habitat has been largely ravaged by oil and gas drilling. Environmental groups are fighting hard to protect the animal's remaining habitat from further drilling.
Larry Lamsa // Flickr
- Scientific name: Centrocercus minimus
- Red List status: Endangered
- Geographic range: Colorado, Utah
The Gunnison sage-grouse is an unusual species of bird found only in the Southwest. They face threats from a variety of sources, but their habitat has been largely ravaged by oil and gas drilling. Environmental groups are fighting hard to protect the animal's remaining habitat from further drilling.
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25 endangered animals that live only in America
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25 endangered animals that live only in America
Dick Biggins // Wikimedia Commons
- Scientific name: Cyprogenia stegaria
- Red List status: Critically endangered
- Geographic range: Tennessee, Kentucky, Virginia
The Fanshell, a river mussel, has been severely impacted by human activity like dredging, mining, and water pollution. Water conservation activities and erosion prevention are both key to keeping the mussel from disappearing.
Dick Biggins // Wikimedia Commons
- Scientific name: Cyprogenia stegaria
- Red List status: Critically endangered
- Geographic range: Tennessee, Kentucky, Virginia
The Fanshell, a river mussel, has been severely impacted by human activity like dredging, mining, and water pollution. Water conservation activities and erosion prevention are both key to keeping the mussel from disappearing.
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25 endangered animals that live only in America
Harrison George // Wikimedia Commons
- Scientific name: Dipodomys ingens
- Red List status: Endangered
- Geographic range: California
Giant kangaroo rats are the largest species in their family. They got their name because they stand up on their hind feet and hop to move, like a kangaroo. They create complex burrow systems that sometimes have more than five separate entrances. In addition to habitat fragmentation, this species is under threat from rodenticide use in agricultural operations.
Harrison George // Wikimedia Commons
- Scientific name: Dipodomys ingens
- Red List status: Endangered
- Geographic range: California
Giant kangaroo rats are the largest species in their family. They got their name because they stand up on their hind feet and hop to move, like a kangaroo. They create complex burrow systems that sometimes have more than five separate entrances. In addition to habitat fragmentation, this species is under threat from rodenticide use in agricultural operations.
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25 endangered animals that live only in America
USFWS // Flickr
- Scientific name: Elaphrus viridis
- Red List status: Critically endangered
- Geographic range: California
This beetle has a range of only about 7,000 acres in Solano County, California. There are natural gas reserves in the beetle's habitat, so natural gas exploration could further threaten it. Because it is unusually colorful, it could also be a target for illegal collectors.
USFWS // Flickr
- Scientific name: Elaphrus viridis
- Red List status: Critically endangered
- Geographic range: California
This beetle has a range of only about 7,000 acres in Solano County, California. There are natural gas reserves in the beetle's habitat, so natural gas exploration could further threaten it. Because it is unusually colorful, it could also be a target for illegal collectors.
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25 endangered animals that live only in America
Piershendrie // Wikimedia Commons
- Scientific name: Eurycea tonkawae
- Red List status: Endangered
- Geographic range: Texas
This unique salamander spends its entire life underwater. It was only discovered in 2000, but already its population has declined dramatically due to the sensitive nature of these amphibians. The Jollyville Plateau salamander is highly threatened by development, which groups like The Center for Biological Diversity fight in areas known to be inhabited by this species.
Piershendrie // Wikimedia Commons
- Scientific name: Eurycea tonkawae
- Red List status: Endangered
- Geographic range: Texas
This unique salamander spends its entire life underwater. It was only discovered in 2000, but already its population has declined dramatically due to the sensitive nature of these amphibians. The Jollyville Plateau salamander is highly threatened by development, which groups like The Center for Biological Diversity fight in areas known to be inhabited by this species.
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25 endangered animals that live only in America
Pacific Southwest Region // Wikimedia Commons
- Scientific name: Gymnogyps californianus
- Red List status: Critically endangered
- Geographic range: California, Arizona, Utah
Condors are the largest flying birds in North America. Their wingspan is nearly 10 feet from tip to tip. After they nearly went extinct, the remaining 10 wild condors were captured in 1987; reintroduction began in 1992. The condor population has grown to exceed 500 birds today.
Pacific Southwest Region // Wikimedia Commons
- Scientific name: Gymnogyps californianus
- Red List status: Critically endangered
- Geographic range: California, Arizona, Utah
Condors are the largest flying birds in North America. Their wingspan is nearly 10 feet from tip to tip. After they nearly went extinct, the remaining 10 wild condors were captured in 1987; reintroduction began in 1992. The condor population has grown to exceed 500 birds today.
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25 endangered animals that live only in America
USFWS // Flickr
- Scientific name: Nicrophorus americanus
- Red List status: Critically endangered
- Geographic range: Arkansas, Kansas, Massachusetts, Nebraska, Ohio, Oklahoma, Rhode Island, South Dakota, Texas
Burying beetles survive off of the carcasses of dead animals, which they bury in the ground. Biologists aren't sure what has led to their rapid decline, bt it is possible that it has been caused by declines in other species that they rely on to eat.
USFWS // Flickr
- Scientific name: Nicrophorus americanus
- Red List status: Critically endangered
- Geographic range: Arkansas, Kansas, Massachusetts, Nebraska, Ohio, Oklahoma, Rhode Island, South Dakota, Texas
Burying beetles survive off of the carcasses of dead animals, which they bury in the ground. Biologists aren't sure what has led to their rapid decline, bt it is possible that it has been caused by declines in other species that they rely on to eat.
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25 endangered animals that live only in America
Unknown // Wikimedia Commons
- Scientific name: Palaemonetes cummingi
- Red List status: Critically endangered
- Geographic range: Florida
This tiny, translucent shrimp has only been found in a single sinkhole in Florida. Because they are so rare, very little is known about them at this point.
Unknown // Wikimedia Commons
- Scientific name: Palaemonetes cummingi
- Red List status: Critically endangered
- Geographic range: Florida
This tiny, translucent shrimp has only been found in a single sinkhole in Florida. Because they are so rare, very little is known about them at this point.
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25 endangered animals that live only in America
Hiart // Wikimedia Commons
- Scientific name: Palmeria dolei
- Red List status: Critically endangered
- Geographic range: Hawaii
The crested honeycreeper, known in traditional Hawaiian as 'Ākohekohe, was once found on both Maui and Molokai but is now only found on Maui. It is known for its acrobatic movements and how it runs across treetops.
Hiart // Wikimedia Commons
- Scientific name: Palmeria dolei
- Red List status: Critically endangered
- Geographic range: Hawaii
The crested honeycreeper, known in traditional Hawaiian as 'Ākohekohe, was once found on both Maui and Molokai but is now only found on Maui. It is known for its acrobatic movements and how it runs across treetops.
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25 endangered animals that live only in America
Blakenship Emmett // Wikimedia Commons
- Scientific name: Phaeognathus hubrichti
- Red List status: Endangered
- Geographic range: Alabama
The Red Hills salamander is unusually large, growing to near 1 foot long. Unfortunately, its range is very limited. In fact, it is the only terrestrial vertebrate entirely confined to the state of Alabama, where it is the official state amphibian.
Blakenship Emmett // Wikimedia Commons
- Scientific name: Phaeognathus hubrichti
- Red List status: Endangered
- Geographic range: Alabama
The Red Hills salamander is unusually large, growing to near 1 foot long. Unfortunately, its range is very limited. In fact, it is the only terrestrial vertebrate entirely confined to the state of Alabama, where it is the official state amphibian.
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25 endangered animals that live only in America
USFWS // Flickr
- Scientific name: Pituophis ruthveni
- Red List status: Endangered
- Geographic range: Louisiana, Texas
The Louisiana pine snake, one of the rarest snakes in North America, is known for its large eggs. This non-venomus constrictor rarely appears in the wild anymore, but when it does, it lives out its days in the warren of tunnels created by pocket gophers, which it eats.
USFWS // Flickr
- Scientific name: Pituophis ruthveni
- Red List status: Endangered
- Geographic range: Louisiana, Texas
The Louisiana pine snake, one of the rarest snakes in North America, is known for its large eggs. This non-venomus constrictor rarely appears in the wild anymore, but when it does, it lives out its days in the warren of tunnels created by pocket gophers, which it eats.
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25 endangered animals that live only in America
Brian Gratwicke // Flickr
- Scientific name: Plagopterus argentissimus
- Red List status: Critically endangered
- Geographic range: Arizona, Utah, Nevada
Woundfins are tiny minnows that once occupied much of the Colorado River Basin. But because of habitat destruction, invasive species, and other issues, its populations have dwindled significantly. Increased water temperatures are one of the biggest threats to the fish.
Brian Gratwicke // Flickr
- Scientific name: Plagopterus argentissimus
- Red List status: Critically endangered
- Geographic range: Arizona, Utah, Nevada
Woundfins are tiny minnows that once occupied much of the Colorado River Basin. But because of habitat destruction, invasive species, and other issues, its populations have dwindled significantly. Increased water temperatures are one of the biggest threats to the fish.
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25 endangered animals that live only in America
Josh Roswell // Wikimedia Commons
- Scientific name: Pseudemys alabamensis
- Red List status: Endangered
- Geographic range: Alabama
Named for its bright underbelly, which can be red or yellow, this turtle makes its home in freshwater rivers, ponds, and bayous. Unfortunately, when the turtles come onto land to lay eggs, they are a target for drivers who don't see them. The Alabama Department of Transportation has built fences to keep them off highways and has signs on roads during hatching season to keep them safer.
Josh Roswell // Wikimedia Commons
- Scientific name: Pseudemys alabamensis
- Red List status: Endangered
- Geographic range: Alabama
Named for its bright underbelly, which can be red or yellow, this turtle makes its home in freshwater rivers, ponds, and bayous. Unfortunately, when the turtles come onto land to lay eggs, they are a target for drivers who don't see them. The Alabama Department of Transportation has built fences to keep them off highways and has signs on roads during hatching season to keep them safer.
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25 endangered animals that live only in America
Claus Ableiter // Wikimedia Commons
- Scientific name: Pyrgulopsis bruneauensis
- Red List status: Critically endangered
- Geographic range: Idaho
This unusual snail is found only in hot springs in Idaho. It is vulnerable because of this, mainly because of groundwater withdrawal from agriculture. It has also fallen prey to some introduced species of fish.
Claus Ableiter // Wikimedia Commons
- Scientific name: Pyrgulopsis bruneauensis
- Red List status: Critically endangered
- Geographic range: Idaho
This unusual snail is found only in hot springs in Idaho. It is vulnerable because of this, mainly because of groundwater withdrawal from agriculture. It has also fallen prey to some introduced species of fish.
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25 endangered animals that live only in America
Isaac Chellman/NPS // Wikimedia Commons
- Scientific name: Rana muscosa
- Red List status: Endangered
- Geographic range: California
These frogs are usually found within just a few feet of a water source. They mainly appear at high elevations, ranging from 4,500 to 12,000 feet. Unfortunately, fish farming has been a major threat to the frogs, as fish stock compete with them for food.
Isaac Chellman/NPS // Wikimedia Commons
- Scientific name: Rana muscosa
- Red List status: Endangered
- Geographic range: California
These frogs are usually found within just a few feet of a water source. They mainly appear at high elevations, ranging from 4,500 to 12,000 feet. Unfortunately, fish farming has been a major threat to the frogs, as fish stock compete with them for food.
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25 endangered animals that live only in America
Unknown // Wikimedia Commons
- Scientific name: Sternotherus depressus
- Red List status: Critically endangered
- Geographic range: Alabama
It can take this tiny turtle up to 60 years to reach its full length—which is only 12 centimeters. Habitat fragmentation has had a major impact on the turtle, although the state of Alabama now protects it, and recovery efforts are underway to restore its habitat.
Unknown // Wikimedia Commons
- Scientific name: Sternotherus depressus
- Red List status: Critically endangered
- Geographic range: Alabama
It can take this tiny turtle up to 60 years to reach its full length—which is only 12 centimeters. Habitat fragmentation has had a major impact on the turtle, although the state of Alabama now protects it, and recovery efforts are underway to restore its habitat.
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25 endangered animals that live only in America
Desert LCC // Flickr
- Scientific name: Uma inornata
- Red List status: Endangered
- Geographic range: California
This lizard has adapted to life in the harsh desert. It spends most of its daylight hours "swimming" in the sand: burrowing underneath during the worst of the heat. Its biggest threat is human development in its habitat.
Desert LCC // Flickr
- Scientific name: Uma inornata
- Red List status: Endangered
- Geographic range: California
This lizard has adapted to life in the harsh desert. It spends most of its daylight hours "swimming" in the sand: burrowing underneath during the worst of the heat. Its biggest threat is human development in its habitat.
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25 endangered animals that live only in America
US Forest Service // Flickr
- Scientific name: Urocitellus brunneus
- Red List status: Critically endangered
- Geographic range: Idaho
This rare squirrel relies on large amounts of grass and seeds to fatten up for its long winter hibernation. Fire suppression efforts have greatly reduced its food supply, leading to population decline. While the species recovery pattern is largely unknown, there are an estimated 2,200 animals across 54 populations in Idaho.
US Forest Service // Flickr
- Scientific name: Urocitellus brunneus
- Red List status: Critically endangered
- Geographic range: Idaho
This rare squirrel relies on large amounts of grass and seeds to fatten up for its long winter hibernation. Fire suppression efforts have greatly reduced its food supply, leading to population decline. While the species recovery pattern is largely unknown, there are an estimated 2,200 animals across 54 populations in Idaho.
