The elk with a tire around its neck was first spotted in July 2019 by a Colorado wildlife officer in Mount Evans Wilderness.
Credit: Jared Lamb, Colorado Parks and Wildlife

School, homework, canceled activities, and retail shortages may have you feeling tired. But wildlife officials in October reached out to help an elk that was literally tired—the elk had spent two years with a tire stuck around its neck.

The bull (male) elk got a real weight off his shoulders on Oct. 9, 2021, when Colorado Parks and Wildlife officers removed the tire from around his neck. The oddly accessorized elk was originally spotted in July 2019 by a wildlife officer conducting a count of bighorn sheep and mountain goats in Mount Evans Wilderness. The Mount Evans Wilderness covers some 74,401 acres (30,109 hectares) of woods about 40 miles (64 kilometers) west of Denver. Officials had made four attempts to remove the tire over the previous week but were unsuccessful.

Officers do not know how the elk got the tire stuck on his neck. In Colorado, wildlife officials tranquilize about ten bull elk and buck (male) deer each year to remove objects from their necks. Many wild animals get stuck in basketball hoops, hammocks, buckets, laundry baskets, holiday decorations, and other objects. Wildlife officials asked residents of central Colorado to keep an eye out for the elk and to alert them to any sighting. There had been six sightings of the tired elk over the previous two years, mostly on trail cameras. Officials had been working tirelessly to locate and help this particular elk until resident Patrick Hemstreet reported the elk was in a herd of 40 just outside his house in Pine, Colorado. Hemstreet texted Dawson Swanson, a wildlife official who lives nearby.

The American elk is a large deer. The bull stands about 5 feet (1.5 meters) high at the shoulder and may weigh from 700 to 1,100 pounds (320 to 500 kilograms). Its rounded antlers can span more than 5 feet (1.5 meters). The antlers of a grown bull will have a total of about 12 to 14 points. Antlers grow during the spring and summer and are shed in late winter, so wildlife officials believe the elk got the tire stuck either in the winter or early spring. Cows, female elks, are smaller and do not have antlers. During September and October, bulls fight one another to gain control over harems, groups of cows. This activity distracts the elks from the presence of humans around them, making it a convenient time for officers to get the tire off.

Once the officers tranquilized the elk, they determined the animal was about 600-pounds (275 kilograms) in weight and 4 1/2 years old. The officers tried to cut the tire, but they were unable to do so when its steel reinforcement belts broke their saw. Luckily, there was still room around the elk’s neck to remove the tire after cutting off the antlers. The inside of the tire was packed with over 10 pounds (4.5 kilograms) of soil and pine needles. The elk’s neck was in good condition despite carrying around the heavy tire with debris for so long, and the elk’s antlers will grow back. After officials revived the elk, it quickly woke up, stood up, and walked away—tired no more. The officials kept the antlers and retired from their search.

A diver swims over the two-masted schooner Walter B. Allen, which sank in Lake Michigan 1880.
Credit: Tamara Thomsen, Wisconsin Historical Society

Off the lakeshore in Wisconsin, dozens of ships lie under the surface. In October 2015, the National Oceanic and Atmospheric Administration (NOAA) announced a new national marine sanctuary. In June 2021, the NOAA officially designated the Wisconsin Shipwreck Coast National Marine Sanctuary in Lake Michigan. Marine sanctuaries are protected waters, habitats, and archeological sites. In this case, NOAA’s sanctuary protects archeological, cultural, historic, and prehistoric artifacts, along with all historic shipwreck sites that served an important role in maritime heritage. The NOAA and the state of Wisconsin are co-managing the sanctuary.

The area is 726 square nautical miles (962 square miles or 2,492 square kilometers) along the coasts of Manitowoc, Port Washington, Sheboygan, and Two Rivers. The sanctuary protects 36 known shipwrecks. Of those, 21 are in the National Register of Historic Places. Because of Lake Michigan’s cold temperature and lack of salt, these shipwrecks are preserved with more integrity than usual, and some remain mostly intact. Researchers believe there are up to 59 shipwrecks in the sanctuary. Wisconsin spent three decades preserving historic maritime sites against human and natural activities. The sanctuary provides opportunities for archeological preservation, research, and education.

The shipwrecks have historical significance. They include the two oldest known shipwrecks in Wisconsin. From the 1800’s through the 1900’s, the Great Lakes were used to ship such goods as coal, grain, and manufactured goods. Hundreds of thousands of settlers used the lakes to move to the Midwest and West of the United States. Midwestern cities, farms, and industries grew as a result.

In this photograph from July 2021, One World Trade Center (left) and other New York City buildings are shrouded by smoke and haze from wildfires in western North America.
Credit: © Bjoern Kils, New York Media Boat/Reuters/Alamy Images

Have you looked at the sun or moon low in the sky in the past few weeks? You may have noticed them take on hues of orange and red. A hazy film may have blurred out the horizon. These visual effects were caused by smoke and haze from fires in western North America, in what is shaping up to be another record wildfire season. So far this year, wildfires have scorched nearly 3 million acres (1.2 million hectares) in the United States alone.

The Dixie Fire is the largest in California, burning almost 250,000 acres (100,000 hectares). It began near where the deadly Camp Fire burned in 2018, killing more than 80 people. Both fires were sparked by equipment from the utility company Pacific Gas and Electric Co. (PG&E). This month, PG&E announced its intent to bury 10,000 miles (16,000 kilometers) of power lines in areas of the state most at risk for wildfires. The project—which PG&E had long resisted—is estimated to cost at least $15 billion.

California usually dominates the wildfire season. The largest fire of the season, however, belongs to Oregon. The Bootleg Fire started on July 6 and has burned more than 400,000 acres (160,000 hectares). The fire persevered through rain and continues to defy efforts to contain it.

The Bootleg Fire threatened Mitchell Monument, dedicated to the only civilians killed on U.S. soil during World War II (1939-1945). Toward the end of the war, Japan released more than 9,000 bomb-carrying balloons, intended to land on the West Coast of the United States. The bombs caused mostly minor damage. But one bomb killed five members of a picnicking family near Bly, Oregon. Firefighters battling the Bootleg blaze worked to save the forest around the monument, including trees damaged by the bomb blast.

Nearby Idaho and Montana also have dozens of fires. The Canadian province of British Columbia declared a state of emergency due to the hundreds of wildfires raging there. The government of Mexico sent firefighters to the province to assist. Outside North America, fires burned in Greece, Turkey, Russia, and Italy.

Smoke from the North American fires drifted east on the prevailing winds, reducing air quality across the continent. Air quality was affected as far away as New York City. The smoke threatened people with such medical conditions as asthma, chronic obstructive pulmonary disease (COPD), and heart disease.

Climatologists and other experts blame the severe fire outbreaks on the intense drought gripping the western half of the continent. In June, a sizzling heat wave killed hundreds of people in Oregon, Washington, and British Columbia. Experts strongly suspect the drought and heat were intensified by climate change.

Credit: © Uwe Bergwitz, Shutterstock

Australia is famous for its unique culture, metropolitan cities, and unusual wildlife, among other things. Each week, this seasonal feature will spotlight one of Australia’s many wonders.

If you could eat 1,000 somethings in one day, what would you choose? Slices of pizza? Chunks of chocolate? Florets of broccoli?

The small Australian lizard called the thorny devil would choose 1,000 somethings that are a little… different.

The thorny devil, also called the thorny dragon or mountain devil, eats 1,000 ants in a day. And, it does this day after day, because the thorny devil feeds exclusively on ants.

Thorny devils live in dry, sandy areas, including deserts and sandy grasslands and scrublands. They are found from Australia’s interior to the coast of Western Australia.

Thorny devils reach up to 8 inches (20 centimeters) in length. They are covered in spines of keratin, a tough material also found in human hair and nails. Their skin has a banded appearance. The skin color changes with temperature. Thorny devils may appear olive to brown in the cool of the desert morning and evening. They may appear pale yellow and red in the midday heat.

Thorny devils are solitary animals. The thorny devil is active in the daytime. It feeds by positioning itself near an ant trail, using its sticky tongue to slurp up ants. The devil’s teeth are specialized for shearing tough ant exoskeletons (outer coverings).

The thorny devil has a unique way of getting water in dry environments. Its spines are surrounded by a network of microscopic grooves. The grooves draw in dew and other moisture from the lizard’s surroundings through an effect called capillary action. The grooves channel this water to the lizard’s mouth.

Thorny devils are preyed upon by larger lizards and birds. The devil’s spines may help to discourage predators. The animal can also puff itself up with air when threatened. The thorny devil walks with a slow, jerky movement that is thought to confuse predators. A large knob on the lizard’s neck may also confuse predators, appearing as a false head.

Thorny devils are active in the spring and fall. They take refuge in underground burrows during the hottest months of summer and the coldest months of winter. Thorny devils mate in the late winter and early spring. The female lays 3 to 10 eggs in a burrow 12 inches (30 centimeters) deep. The eggs hatch in three to four months. Thorny devils can live to about 20 years in the wild.

Periodical cicada
Credit: © Thinkstock

They’ve waited underground for 17 years. Now, they’re coming to the surface to burst out of their skins, give off earsplitting screeching sounds, bore into trees, and cover the ground with their carcasses. But—like many blockbusters over the past year and a half—you can’t view this spectacle in movie theaters. You can’t even stream it on Netflix. If you live in the eastern U.S. Midwest or Middle Atlantic, this summer’s invasion is coming to a backyard or forest preserve near you. It’s called Brood X.

Brood X is not a movie, but a group of cicadas emerging this month. A cicada is a large insect with four thin wings which it folds over its body like a peaked roof. It can measure 1 to 2 inches (2.5 to 5 centimeters) long. It has a wide head and short, bristlelike antennae (feelers).

Just as crickets serenade us on warm summer nights, cicadas make up the soundtrack of hot summer afternoons. The male cicada makes two drumlike membranes (thin sheaths of skin) on the abdomen vibrate rapidly. This produces a characteristic buzzing sound. The sound attracts females or calls large numbers of males together. Each species (kind) of cicada has its own song. Male cicadas often assemble in large groups and produce a loud chorus of sounds.

Many of us hear cicadas every summer. So why is this summer different? There are thousands of species of cicadas. They can be roughly divided into two types: annual cicadas and periodical cicadas. As their name suggests, annual cicadas can be heard every year. But periodical cicadas emerge on 13- or 17-year cycles. Brood X is a 17-year periodical cicada, having last emerged in 2004. Other brood numbers (X is the Roman numeral for 10) emerge in different years in different regions. But Brood X is one of the largest and most famous.

Why do periodical cicadas emerge this way? It has to do with evading predators. Cicadas are a hearty, protein-packed snack for birds, raccoons, foxes, opossums, fish, spiders, and practically any other animal. Humans eat them, too! Cicadas are vulnerable when they are emerging. They don’t bite or sting and are clumsy flyers. But when so many cicadas emerge at once, there are just too many for predators to eat. Even with every predator’s belly filled with cicadas, billions or trillions survive to reproduce.

Seventeen years is a long time. Potential predators can’t rely on a food source that appears so infrequently. So, although animals take advantage of the cicada smorgasbord, nothing has evolved to rely on them exclusively.

Where do periodical cicadas go for all those years? After the adults mate, the female bores into twigs of bushes and trees with a sawlike organ near the tip of her abdomen. She lays her eggs in the holes. The eggs hatch in a few weeks and the young cicadas, called nymphs, drop to the ground. They live in the soil and eat roots for years—17 years in the case of Brood X.

The periodical cicadas will spend the summer shedding their skins and making lots of noise. However you decide to spend your summer, have fun and keep an ear out for Brood X!

Swedish environmental activist Greta Thunberg
Credit: © Alexandros Michailidis, Shutterstock

April 22 is Earth Day, an annual observance to increase public awareness of environmental issues. Each year on Earth Day, millions of people throughout the world gather to clean up litter, protest threats to the environment, and celebrate progress in reducing pollution.

Earth Day began in the United States. In 1969, the U.S. Senator Gaylord A. Nelson suggested that a day of environmental education be held on college campuses. The following year, the lawyer and environmentalist Denis Hayes, then a recent graduate of Stanford University, led hundreds of students in planning and organizing the observance of Earth Day on April 22, 1970. About 20 million people participated in this celebration.

The observance of Earth Day in 1970 helped alert people to the dangers of pollution and stimulated a new environmental movement. That same year, Congress created the Environmental Protection Agency to set and enforce pollution standards. Congress also passed the Clean Air Act of 1970, which limited the amount of air pollution that cars, utilities, and industries could release. Other new environmental laws soon followed.

One modern champion for the environment is the Swedish activist Greta Thunberg. She has worked to convince politicians to take action against climate change due to global warming. Global warming is an observed increase in Earth’s average surface temperature. As a teenager, Thunberg became known for her boldness in confronting adult politicians for their inaction on climate change. She has called upon leaders to reduce emissions of greenhouse gases, mainly carbon dioxide. Such gases trap heat in the atmosphere, warming the planet’s surface.

Thunberg was born in Stockholm, Sweden, on Jan. 3, 2003. She was diagnosed with autism spectrum disorder at a young age. As a child, she showed an interest in environmental issues. She convinced her family to reduce their carbon footprint by becoming vegan and giving up air travel. Carbon footprint is a measure of the greenhouse gas emissions associated with human activities.

In 2018, at the age of 15, Thunberg protested for action on climate change outside the Swedish parliament, inspiring other student protesters. Together, they organized school strikes to demand action on climate change. In August 2019, Thunberg sailed across the Atlantic Ocean from Plymouth, in the United Kingdom, to New York City, in the United States, on a “carbon neutral” voyage. Thunberg sailed aboard a yacht that got its electric power from solar panels and underwater turbines. While in the United States, she addressed the United Nations as part of its Climate Action Summit. During her speech, she announced that she and a group of other children were filing a lawsuit against five nations not on track to meet their emission-reduction targets under the Paris Agreement. The Paris Agreement is a global treaty designed to fight global warming.

Black-footed ferret in the wild
© Kerry Hargrove, Shutterstock

Have you ever wanted to clone yourself? Maybe you thought, “While I play video games, my clone can do all my chores!” Well, if you are a black-footed ferret, it’s your lucky day. (But, we’re pretty sure black-footed ferrets don’t play video games.)

In December 2020, the weasel world welcomed a cloned black-footed ferret named Elizabeth Ann. She became the first of any endangered native North American species to be cloned. In a few years, Elizabeth Ann might have siblings. The successful cloning is promising, because it offers hope that cloned animals could help save species from extinction. Extinction occurs when every member of a species of a living thing has died.

In the past, black-footed ferrets lived throughout much of the Great Plains. They depended on hunting prairie dogs for food and lived in the prairie dogs’ underground burrows. Since the late 1800′s, however, ranchers have eliminated prairie dogs from much of the Great Plains because they consider the animals to be pests. The black-footed ferret has become rare as a result of the decline in prairie dogs. Disease and the loss of rangeland to agriculture have also reduced the ferret’s numbers. Scientists once thought black-footed ferrets were extinct.

In 1981, ranchers in Wyoming discovered a population of more than 125 black-footed ferrets. Over the next several years, many of these animals died of a disease called distemper. To keep them from dying out completely, the U.S. Fish and Wildlife Service and the Wyoming Game and Fish Department captured the remaining animals. Scientists have successfully bred the ferrets in captivity. In 1991, they began releasing captive-bred ferrets into western grasslands that were home to prairie dog populations. The ferrets began reproducing again in the wild.

The black-footed ferret is not the first animal to be cloned. Scientists used a technique called nuclear transfer to clone such amphibians as frogs and salamanders as early as the 1950′s. In 1996, a group led by the British scientist Ian Wilmut used the procedure to clone a sheep. The sheep was the first mammal cloned from a donor cell from an adult mammal. They named the clone “Dolly.” Since the cloning of Dolly, scientists from many countries have used a similar technique to produce clones of mice, cattle, cats, and other mammals.

A koala mother and her joey (young) rest in a eucalyptus tree. Eucalyptus leaves and shoots make up the main part of a koala’s diet.
© Shutterstock

It’s summer in Australia, so you know what that means—time for a koala count! The Australian government has funded a project to count the population of the beloved teddy-bearlike mammals, as well as record where the marsupials (pouched mammals) live. The government commissioned this project because, in recent years, estimates of the koala population have varied greatly. In 2016, for instance, there were an estimated 300,000 koalas in Australia. Three years later, that number was down to 80,000, with some scientists saying the number was as low as 43,000.

In previous counts, people merely counted how many koalas they saw. But, koalas spend almost all their time in eucalyptus trees, making it difficult for people to spot them among the leaves. For the new count, humans will still venture into the forests to search for koalas. But, to ensure a koala-ty count, the government has also introduced some new methods. It will employ heat-seeking drones. A drone is an aircraft designed to operate without a pilot on board. The drones will detect the body heat that a koala gives off. The government will also use dropping-detection dogs—that is, dogs that identify koala droppings. The droppings serve as evidence that koalas live in the area. In addition to detecting droppings, these dogs can sniff out koalas themselves.

In recent years, the koala population has declined. People have cut down eucalyptus forests for housing developments, resorts, and farmland. In addition to spending most of their time in the forks of eucalyptus trees, koalas eat mainly the leaves and young shoots of eucalyptuses. They even get most of the water they need from eucalyptus leaves. Koalas are also vulnerable to natural disasters. Tens of thousands of koalas were killed when bushfires devastated large areas of Australia in late 2019 and early 2020. In fact, a study by the World Wildlife Fund (WWF) estimated that more than 60,000 koalas had been either killed, injured, or displaced by the fires. This staggering number led some scientists to say that the animal was “functionally extinct.”

There are efforts to increase the koala population in Australia. For instance, the WWF hopes to use drones to drop eucalyptus-tree seeds in forests. The WWF will also create a fund to sponsor koala sanctuaries (safe spaces).

A rural official in Japan shows off a mechanical Monster Wolf, invented to frighten away wildlife.
Credit: © Toru Yamanaka, Getty Images

The Japanese motion picture Gojira (1954) introduced one of the most recognizable monsters in popular culture, often called by its American name, Godzilla. In the film, the giant, dinosaurlike monster goes on a destructive rampage through Tokyo. Now, Japan has a new monster—but, unlike Godzilla, this monster protects the country’s people.

This fall, officials in the city of Takikawa—on Japan’s northern island of Hokkaido—installed two mechanical wolves near a residential neighborhood in which bears had injured or killed people in recent months. Wild bears in search of food had been entering areas on the edge of Takikawa, walking through yards and rummaging through trash. Rural areas often serve as barriers between the wilderness and urban areas. But, as rural populations shrink, so too does the barrier between wilderness and populated areas.

Each Monster Wolf, as the machines are called, looks a lot like a normal wolf, if you ignore the metal legs and flashing red eyes. A Monster Wolf is 4 feet (1.2 meters) long and just under 3 feet (0.9 meter) tall. Along with its fake fur and bared fangs, the Monster Wolf shares perhaps the wolf’s most distinctive feature, an eerie howl. The Monster Wolf’s head has motion detectors that are triggered when intruders approach. The wolf then produces howling, screeching sounds. Other frightening noises the robot can imitate include a dog’s bark, a hunter’s voice, and gunshots.

The mechanical wolves in Takikawa are not the country’s first. Since the Monster Wolf was created in 2016, more than 70 of them have been installed in communities across Japan. The creations have previously scared off such animals as deer and monkeys, which have been filmed leaping away from the mechanical nightmares. Since the wolves showed up in Takikawa, there have been no bear sightings.

Motorists stop to observe the Walbridge fire, part of the larger LNU Lightning Complex fire, from a vineyard in Healdsburg, California, on Aug. 20, 2020. A series of massive fires in northern and central California forced evacuations as flames quickly spread, darkening the skies and polluting the air.
Credit: © Josh Edelson, AFP/Getty Images

Wildfires have ravaged the U.S. state of California, killing at least 5 people and forcing thousands to evacuate (leave) their homes. Fueled by a heat wave and sparked by lightning strikes, the wildfires have set the state ablaze and covered the air in thick smoke.

Wildfire is the uncontrolled burning of large areas of vegetation. Wildfires may be ignited by human activities or by natural causes. Such natural causes include lightning, volcanic activity, or even intense sunlight. Wildfires occur on every continent except Antarctica. They are most common in the temperate forests and grasslands midway between the equator and the poles. They are less common in tropical and desert ecosystems.

These are far from California’s deadliest wildfires. Numerous major wildfires occurred in California in the early 2000′s. In 2003, wildfires in southern California destroyed thousands of homes and killed more than 20 people. In 2007, deadly wildfires forced the evacuation of about 500,000 people in San Diego County. In 2013, the so-called Rim Fire burned large areas of the Stanislaus National Forest near Yosemite National Park. Some of the largest wildfires in California history burned during the summer of 2018.

The unhealthy air quality caused by the wildfires is especially concerning, because of the pandemic (global outbreak) of the respiratory disease COVID-19. Smoke-polluted air can weaken lung function, reducing the body’s ability to fight infection.

The current round of fires was made worse by an intense heat wave baking the American Southwest. On August 16, temperatures in California’s Death Valley reached 130 °F (54.4 °C). If these measurements are confirmed, they would be the hottest surface air temperatures ever recorded on Earth.