Recently in Environmental Threats Category

John James Audubon -- Environmentalist?

| | Comments (0) | TrackBacks (0)
gerfalconaudubon.jpgJohn James Audubon's images may be beautiful, but they were created at the heavy cost of avian lives. 

Take the example of a majestic, 3-foot female eagle in his studio. It was not enough that it was captive in a small cage (making it easy to draw), but he wanted to kill it. 

So he put it in an enclosed, dark closet with a coal fire to suffocate the wonderful creature. After hours, he opened it. Her head swung toward him. It looked at him. It was alive. Then he put the eagle back into the closet, added sulphur to the fire, and closed the door. This time the fumes smelled so strongly he and his brother left the house. For a long time the eagle was perched alone in that dark, extremely hot and unbearably toxic closet. Audubon entered the house and made his way to the flaming confinement.

Again, the yellow beak and imposing eyes belonging to the bird of prey swung his way. The eagle was alive. So once more he attempted to kill the eagle. He tried to electrocute it, but the biggest battery he could find could not inflict enough current. He took a piece of pointed steel in his hand. The eagle's life ended, after many forms of inhumane torture. 

He described this in his own diary, which was known as his "Ornithological Biography," even though several times he considered letting it go. 

And there is no need to believe that the so-called "conservationist" did this sort of thing to only one bird of a species. For his portrait of a flamingo, approximately fifty flamingos were used as models -- and killed. 

Despite the fact that his artwork may be picturesque and beautiful, it is not near worth the lives of hundreds of birds -- and the allowance of animal cruelty. 

The Endangered Snow Leopard

| | Comments (0) | TrackBacks (0)
Snow-Leopard.jpgIn the deep dark chasm,
Upon the sides of the walls,
Motion with lightning's shape and speed,
And before it the swift deer falls. 

Its color blended ever light,
Gray white and shades of dun,
Streamlined shape and hunter's eye,
And incredible speed to run. 

Against a snowy background,
Imposing yet serene,
The fearsome leopard of the snow,
Can hardly yet be seen. 

-Katrianna Sarkar

Snow leopards are endangered from causes such as the trade in its pelt and global warming. The fur is made into coats and hats, and their bones and other body parts are also used in traditional medicine. Tigers are supposed to be used in the practice of traditional medicine, but they are already so rare (their populations have lessened from this too) that the more common snow leopard is substituted. 

Their numbers are hard to estimate, due to the fact that snow leopards live in rugged, remote terrain. This makes conservation more difficult, so an interesting device was employed. With as few snow leopards as there are, you can tell the individual leopards by their spots.  As a result, pictures taken by a remote camera are compared to those in a photo library. In that way, they can estimate how many there are.

As elusive as snow leopards are, we still know quite a bit about them:

Wild sheep and goats are the snow leopard's main food, as well as an occasional buck or rabbit.

A snow leopard can leap thirty feet.

Snow leopards have enormous, furry tails. They use them for balance, but if they get cold they can wrap their tail around themselves.

Snow leopard cubs have blue eyes. When they get older, snow leopard eyes get grayer.

Let's hope we can save them. We should start conserving energy by using solar power and stop buying coats made from snow leopard, or, for that matter, any other kind of fur.

California Condors: 9-foot Thunderbirds

| | Comments (0) | TrackBacks (0)
cndr.jpgCalifornia condors are remarkable birds. They have a nine-foot wingspan, the largest of any North American bird! They are so large that they are more often mistaken for airplanes than other birds. Due to their size, Native Americans called them "thunderbirds," because the sound of their wings flapping purportedly made thunder. They are mostly black, with white patches under the wings. Another myth, from the Chumash tribe, tells that condors once had white feathers, but were burned when they got too close to a fire.

The critically endangered condors are in the same family as vultures, and many vultures are scavengers, meaning that they eat the remnants of dead animals. Unlike some vultures, however, condors do not have a particularly good sense of smell, instead using their sharp eyes to find food. They do not have talons and cannot carry prey, so they eat 2-3 pounds of food at a sitting and then sit for a day to recover! They are so big that they intimidate most would-be competitors for food. Even bears ignore them, and golden eagles are the only species that will fight them. Dominant, older birds eat before the younger ones.

Condors mate for life. When a male spots a potential mate, his head turns bright red and he walks towards her with his wings spread. If she lowers her head, it means she accepts. Although no actual nest is built, they lay their eggs in hard-to-access caves in rocky cliffs. Incubation takes two months, with the parents taking turns sitting on the egg.

At one point, there were thousands of condors in the wild. Ten thousand years ago, they lived on both the Pacific and Atlantic coasts, from British Columbia to Baja California and from New York to Florida. However, they were endangered by many factors. They were hunted (particularly for museums) and poisoned by DDT. They got lead poisoning by scavenging dead animals killed by hunters who used lead bullets. Their habitat was also destroyed, and, as more people moved in, condor collisions with power lines increased. Additionally, people collected the condors' eggs. In the Gold Rush, condors were even turned into pets. The entire California condor population was reduced to 22 birds.

condorbaby3.jpgCaptive breeding programs saved the condors. In the wild, condors are slow breeders, but they "double-clutch," or lay a second egg if the first one is lost or taken. So scientists took the condors' first eggs, allowing the pairs to raise the second eggs. The first eggs were put in an incubator until they hatched, when the chicks were fed with condor puppets and recordings of condor sounds were played to them. In twenty years, the population grew to 200 birds.

Today there are 369 condors in the world, and 190 of these are wild. However, they are not safe. Some of them have been killed by coyotes or eagles. Some still flew into power lines, but now before new birds are released they "undergo a power pole aversion training program which uses mock power poles that deliver a small electric shock to the birds when they try to land on them," according to the US Fish & Wildlife Service. This has effectively stopped the collisions. They are also accidentally hunted, or are poisoned by chemicals. Lead poisoning from scavenged meat is still one of the biggest threats. Since reintroduction, 15 condors have died from lead poisoning. (Nine of the cases were proven, and six were recorded as very likely.) Recently, lead ammunition has been banned within the condors' range. Although some people refuse to comply with this law, it has reduced the risk. They have been reintroduced to parts of California, Arizona, and Utah. They are still very rare, but their populations are increasing. Captive breeding and careful conservation seem to have saved this magnificent raptor.

Fascinating Facts About Red Pandas

| | Comments (1) | TrackBacks (0)
red panda.jpgWhen most people see the word "panda," they think of the big, furry, black-and-white Giant Panda. But the lesser-known Red Panda, three times smaller, is also in danger. Today classified as vulnerable, its status could quickly change to endangered.
 
The red panda is a living fossil. It has no close surviving relatives, and most resembles raccoons and skunks, not giant pandas. Living in temperate (neither tropical nor arctic) mountain forests from Nepal to China, they spend most of their time in trees. They are both nocturnal and crepuscular, meaning that they come out in the early morning and evening. The red panda is also called the cat-bear, lesser panda, and fire fox. The browser "Mozilla Firefox" was named after them.

Their diet is two-thirds bamboo, but they also eat acorns, flowers, berries, lichen, mushrooms, roots and grasses and occasionally insects, fish, eggs, and chicks. Like giant pandas, they have a bone that acts like a thumb, helping them hold the bamboo. However, because bamboo is low in calories, they spend most of their time eating and sleeping. They drink by dipping one paw into water and then licking it!

The red panda is threatened due to many factors. Deforestation reduces their habitat and grazing livestock can trample their bamboo. In China, they are poached for their fur, which is considered good luck by newlyweds and used in traditional ceremonies. Although the practice of capturing red pandas for zoos has ended, they are sometimes sold to private collectors and are occasionally kept as pets in Nepal and India. Even without interference in the wild, the red panda has a low birth rate and high death rate.

However, red pandas are officially protected throughout their range and hunting them is illegal. Parks protect them in every country they live in and some villages are involved in conservation, as well. Although some originally trapped wild red pandas, many zoos have developed successful captive breeding programs. If we protect them now, the red panda will flourish in the wild.

Mustelid Crossword

| | Comments (0) | TrackBacks (0)
crossword final.jpg

crossword clues FINAL FINAL.jpgFor help solving the puzzle, see Wikipedia's article.

Warning! The answers are below.

crossword answers.jpg


Black-footed Ferrets

| | Comments (0) | TrackBacks (0)
blfofe.jpgBefore 1851, no one had heard of a black-footed ferret. That was the year in which John James Audubon and John Bachman wrote a book together titled The Quadrupeds of North America. This was the first work to mention the species, but it was still more than twenty-five years before their existence was proven. (Audubon, who sometimes killed fifty birds of one species to produce one painting, only got to see one ferret while working on his book, which was not enough evidence to prove that the black-footed ferret was a new species.)

Although they lived throughout the Great Plains, the ferret population has been falling ever since we first knew about them. One reason for this is that the ferrets are so dependent on prairie dogs, a species of ground squirrel. Not only are these rodents their staple food, the ferrets also cannot dig their own burrows and are squatters in prairie dog towns. When settlers moved west, many became farmers. They plowed under the prairie dog towns and hunted or poisoned many of the animals. Both the prairie dogs and the ferrets grew increasingly fewer.

Then, in 1981, a Wyoming dog named Shep found a ferret. Eventually, the animal was identified and its colony -- of about 130 animals -- found. However, this population quickly plummeted due to canine distemper and sylvatic plague. In 1986, the remaining 18 animals had to be removed from the colony. The ferret was extinct in the wild.

At this time, there were only fifty captive black-footed ferrets in the world. After years of captive breeding, the first place to reestablish a small colony was Wyoming in 1991. Now, there are fifteen established fesnyngs (or businesses: the name for a group of ferrets) in the wild, in eight US states as well as Mexico and Canada.

There are, however, still threats to their survival. Their close relationship with prairie dogs does not aid their recovery. Prairie dogs are often viewed as pests because they prevent farmers from growing crops in certain areas by rooting up the plants around their burrows. Their tunnels also make the ground less stable and more prone to collapse if animals are turned out to graze.

Because of these things, many people dislike prairie dogs. Even today they are hunted, both commercially and privately. To eradicate colonies, they are poisoned, which indirectly affects many other species. Two of the popular poisons, Rozol and the recently approved Kaput-D, contain chemicals that thin the prairie dogs' blood until they bleed to death. Not only is this horrible for the prairie dogs, any animal that eats them will encounter the same fate. Black-footed ferrets, swift foxes, American badgers, ferruginous hawks, and golden and bald eagles all prey on prairie dogs. An infected animal is easy to catch because it becomes unable to move quickly or control its motions, so many of these predators are suffering secondary poisoning. Additionally, mountain plovers and burrowing owls live and nest in prairie dog burrows and can also become infected.

Another threat to ferrets is disease, particularly sylvatic plague. Luckily, the animals can be immunized against the disease, and all ferrets born in captivity are required to be given two shots of the medicine. Although prairie dogs are also susceptible to this, it has been found more difficult to protect all of the wild colonies from the bacteria. One widespread method was to spray each burrow with flea-killing pesticides, but scientists realized that this was probably too expensive and hard to do and maintain. There had to be an easier way to accomplish this. Finally, they developed a medicine that could be mixed in with food left for the prairie dogs to eat. This also proved more efficient than the pesticides. Additionally, these studies will benefit other species susceptible to the sylvatic plague, both wild rodents and some pets.

There are now more than 1,500 ferrets throughout the established colonies, so the species has been upgraded from extinct in the wild to endangered. Although the number is low, it is still a success considering how few animals lived at one point. Black-footed ferrets are considered the most endangered mammal in North America, but the numbers are still rising to the extent that they may become relatively common over time. The current ambition is to establish ten breeding populations in the wild. When this is met, the ferret can be listed as threatened, instead of endangered. When this happens, the ferret will have returned.

Bear in Terrain

| | Comments (0) | TrackBacks (0)
bear.jpg"Look," Mikaela cried as we glimpsed a furry, brown leg, "A bear!"

We all ran out onto the smaller balcony and looked out. A young black bear was gazing at us, puzzled. Mom was leaning out the bedroom window taking photos with her new camera, and I was taking some pictures as well.

He was young. The year before we had discovered him, just an overgrown cub, at the fork in the unpaved road where our steep driveway met the neighbor's. Now he was bigger, we noticed, as he crossed the "animal highway." This was where deer and coyotes, but never before a black bear, made their crossing behind our house.

He loped off the other way and disappeared into a myriad of bushes and berries. He was gone.

Black bears are smaller than grizzly bears and do not have as defined a shoulder hump as their relatives. Grizzly bears' humps are shoulder muscles useful for digging up roots. Grizzly claws, partly for the same reason, are larger than black bears' claws. Signs that a bear has been somewhere are digging sites, clawed trees, and tracks which have five toes and look heavy. (The main hand is a thin egg shape with a little triangle at the end.)  A black bear is eighty-five percent vegetarian, and most of the carnivorous percentage consists of bees, ants, and yellow jackets.
 
Kermode Bear Planet Green.jpgThere is such a thing as a Kermode or Spirit Bear. These are rare, white subspecies. Only one in ten are completely white, and some are tan with patches. It is very special to see a Kermode bear. They are not albino, however, and are white because of a recessive gene. Other subspecies include the Eastern black bear, the Florida black bear and the Newfoundland black bear. The Florida black bear deserves special attention because it is threatened. At first, the Fish and Wildlife Department declared it threatened except in areas where it was a game animal. This was a rather hypocritical statement, as a bear could be passing a hunting area, though it was born in a refuge. Probably the Fish and Wildlife Department realized that after the criticism that they got. The Florida black bear is listed as threatened wherever it occurs.

In the case that you meet a black bear on a trail, rangers advise you to put up your hands and raise a backpack (if you have one) above your head to frighten it off. Do not do this unnecessarily, like if you hear rustling in the bushes a ways off the trail. However, do talk or clap your hands in such cases. Finally, if a black bear attacks you, fight back.

Harboring Harbor Seals

| | Comments (0) | TrackBacks (0)
harborseal.jpgThere's a good reason why the harbor seal is also called the "common seal." They're found all over the northern hemisphere's coastlines, in the Pacific and Atlantic oceans and throughout the North and Baltic seas. They are also the most widespread pinniped, a term which refers to true seals, eared seals (sea lions and fur seals), and walruses. (Neither true seals nor walruses have ear flaps, known as pinnas.)

Harbor seals are true seals. They have small flippers that do not rotate and consequently have a hard time moving around on land. They rely on layers of blubber for warmth, buoyancy, and extra energy. The blubber also allows the seal's skin to be the temperature of the water surrounding it, while their core temperature, or how warm they are inside, is 100° F. They have large eyes, but most scientists think that their color vision is very bad, if existent. Harbor seals have better eyesight than humans underwater, but worse on land. Since blind seals have been found with pups in the ocean, scientists believe that sight is unimportant to harbor seals. Although they usually stay closer to the surface and come up for air once in ever three to seven minutes, they can dive 1,500 feet underwater and stay submerged for 40 minutes! Mostly, these seals catch fish, but sometimes when they've gone that deep they'll eat shrimp, crabs, mollusks, octopods, and squids.

Harbor seals spend approximately half of their time in the ocean, and the other half on land. Although they typically stay in the water only when feeding, they have been known to sleep in the water, too. Places where they regularly rest on land are called "haulouts," and the process of a seal climbing up onto the land is called "hauling out." Unfortunately, if people repeatedly disturb them they will abandon their haulouts or even their babies. Sometimes, seals dart into the sea as soon as they see or hear people. That's why beaches often post signs warning people to stay at least 100 feet away from the seals and use binoculars or cameras. Goat Rock Beach suggests 150. The Point Reyes National Seashore website advises visitors to come no closer than 300 feet.

To attract a mate, male seals will form a group, put their heads together and call the females. It is thought that the females select the strongest males. Although they can be seen at any time of the year, the best time to view harbor seals in California is probably from February to April, when they are having their babies. In the Arctic, they may wait until July! Young seals are called pups and usually born with a spotted coat. If you see a pup with a white coat, called a lanugo, it was born prematurely. (In the Arctic, the pups are born with the white fur but molt soon afterwards.)

sealsgoatrock2.jpgHarbor seals haul out on many beaches. We saw them in February on California's Goat Rock beach. (The origin of Goat Rock's name is disputed. There is a very large rock connected to the beach by a thin strip of land, and the most popular theory states that goats used to be permitted to graze on the rock because they were the only species surefooted enough to climb it.)

The Californian or Pacific harbor seal is a subspecies of harbor seal found along the entire coastline of California. In the San Francisco bay, some seals appear reddish. This unusual coloration is thought to result from tiny quantities of elements, such as iron or selenium, in the water.

Some field guides make it sound like it is very difficult to tell a harbor seal from a sea lion, but it is actually very simple. Harbor seals are usually light gray, and sea lions are dark brown. The sea lion is able to flip its flippers forward so that it can walk on land. For the most part, the seals lie on the beach, while the sea lions sit up on their front flippers and grunt. Additionally, studying a photo of any animal beforehand will help you identify it in the field.

The worldwide population of harbor seals is five or six million. Hunting seals is illegal throughout most of their range, but certain subspecies are threatened. Besides people disturbing them on beaches, the seals are caught in fishing nets and hit by boats. They are endangered by chemicals dumped in the water or released by power plants. Diseases such as the phocine distemper also threatened them. And while it is illegal in the United States to hunt harbor seals, if a seal is thought to endanger a fishery it can legally be killed. Happily, however, the numbers of harbor seals have been rising on the east coast of the US, and some have even been spotted in Florida. With care, these seals will continue to haul out throughout their widespread range.
kemp's ridley sea turtleThe BP oil spill threatens hundreds of different species, from crabs to dolphins to pelicans. However, the five species of sea turtles living in the Gulf of Mexico -- leatherback, hawksbill, green, loggerhead and Kemp's Ridley -- all of which were endangered or threatened before the BP oil spill, may be hit the worst. 200 dead turtles have been found along the Mississippi coast alone. The Kemp's Ridley sea turtle, which was critically endangered and the rarest sea turtle before this disaster, may have the hardest time surviving. As well as being hunted (in parts of Mexico, they are eaten and used for leather in making boots), they are susceptible to becoming entangled in shrimp-catching nets. But the oil spill has introduced many more threats that the turtles do not know exist and will have an even harder time avoiding.

Right now, the adult turtles are coming ashore to lay their eggs. The beaches on which they lay their eggs are now covered in oil, which is not good for the hatchlings. If the eggshells, which are soft and about the size of ping-pong balls, make contact with the oil, they weaken and there is less of a chance that the turtles will hatch. Even if they do, the hatchlings may be deformed. Those that live will have to cross the polluted beaches to get to the sea and then swim through the oil in the gulf waters. The Kemp's Ridley hatchlings are leaving their nesting grounds in Mexico to swim into the most contaminated part of the gulf, where their instinct to hide and eat amongst clumps of floating vegetation is leading them to clots of oil and polluted seaweed. Their instincts, which come from living in the ocean for over 100 million years, have taught them how to avoid predators like sharks but have not taught them how to cope with exploding oil wells.

No matter how old they are (many sea turtles live for 30 years), if a turtle is exposed to the oil for 4 days, their skin will peel off in sheets, a condition which lasts even after they have been cleaned and treated. The toxic chemicals cause diseases and damage to their livers, kidneys, and brains that might lead to the deaths of many of these animals. The oil also damages their chemoreceptors, which control their senses, making them unable to find prey, to know where their habitat is, or to understand movement. Because they moved farther inshore in their attempts to avoid the oil, they were eating fishing bait and consuming hooks. In June, 583 sea turtles were found in the contaminated area. 447 of these were already dead or died soon after they were discovered, and only 136 were taken to rescue centers. Worst of all, when BP tried setting some of the oil on fire, hundreds or possibly thousands of sea turtles were burnt and killed.

At least some efforts are being made to save the sea turtles. A qualified biologist will be aboard every boat involved in burning the oil to remove the turtles from the area. And 70,000 eggs from the different species of sea turtles are being carefully dug up from their burrows in the sand, because it is difficult to move or disturb the eggs without harming the embryos, and taken to a climate-controlled hangar at Kennedy Space Center in Florida. After they hatch -- if the oil doesn't flow around Florida to ruin the plan -- the turtles will be released in the clean waters of the Atlantic.

For thirty years before the spill, scientists, environmentalists, and volunteers have been trying to save sea turtles in the Gulf of Mexico. Their programs were working. For my sixth birthday, we drove to a Kemp's Ridley sea turtle hatchery in Galveston, Texas, the only one in the United States. Inside a rather small shack, we saw hatchlings, one-year-olds, two-year-olds, and huge three-year-olds in tubs being fed. It was not very impressive, but they were saving the turtles. We learned about the dangers faced by Kemp's Ridley and Leatherback sea turtles back then and today. People dumping garbage into the oceans is not a new issue, as is the fact that turtles choke on plastic squids used by fishermen to attract animals. If these turtles were in such danger before, now conservation is even more vital in these animals' survival.

Hopefully the conservation efforts will work and the turtles will continue to live healthily in clean water, but all of the other animals that live in the gulf face similar problems. This still leaking spill, which is even worse than the Exxon spill, is just another reminder that we need to work on green energy. We cannot continue to drill for oil and risk losing millions of animals as well as our own safety and the state of our world. The stories of these turtles and of all of the other, less well-known animals that are in danger need to prompt immediate action that will save our planet before it is too late.

Less Fog Means Withering Redwoods?

| | Comments (0) | TrackBacks (0)
rdwd1.jpgBesides the obvious issues that global warming introduces, like the melting of the polar icecaps or the rising ocean levels, issues affecting smaller areas are still disastrous. They are determining the future of our everyday lives and the land set aside permanently as national parks. According to a recent National Geographic news article, redwood trees, the world's tallest living things, may go extinct. We might have seen them just in time.

When we were staying in CA, sometimes we would be driving in at night. We lived about 45 minutes away from the beach, so the fog would drift in over the road and make it nearly impossible to see. We would cross over Golden Gate Bridge and look down at the gently rolling mists. While they made it harder to drive, they were also essential to the survival of these botanical giants.

The clouds kept the conifers moist, at exactly the climate they required. A hundred years ago, there was no threat from global warming. A university study said that there has been a 33 percent reduction in the amount of coastal fog produced today when compared to the data from a century ago.

The redwoods only live in the humid areas near the coast, where the fog keeps them watered. Because they have adapted to this ecosystem, they cannot live long in a drought by shutting down their systems to conserve water, as other desert plants do. This means that if there is nothing that can be done, the redwoods may dry out and wither. Some other species of tree, however, can adjust to living with less fog by not growing as quickly as they do in years when water is plentiful.

We went to Humboldt State Park on a mostly overcast, cold day. Logging had thinned many of the forests; the largest existing piece of hewn redwood, made into one person's RV, is on display at the park's visitor center. Early environmentalists had preserved large groves, which have been turned into state parks. To this day, the groves bear names like "Founders Grove," or "Rockefeller's Grove," after these early conservationists.

The tallest tree blew over in a storm a few years before and became a "nurse log." Nurse logs are decaying trees that provide the necessary nutrients for other plants to grow. Saplings, fungi, ferns, and lichen are common plants that sprout from the reddish-brown bark. Insects, like beetles and ants, live in the log's crevices. In places humid enough, these are also home to banana slugs and snails.

As well as being an impressive species themselves, these trees are essential to many other kinds of life. The terrible fact that they are in danger means that if they do not live, their ecosystem will be seriously disrupted. This issue is another reminder that the choices we make in our everyday lives do have consequences and therefore we need to decide to do everything in a manner that will not harm the planet. The fate of these giants is uncertain, the fate even of our planet is uncertain, and it's our actions that will determine it.

About this Archive

This page is a archive of recent entries in the Environmental Threats category.

Environmental Heroes is the previous category.

Extinct Species is the next category.

Find recent content on the main index or look in the archives to find all content.