1

American Alligator

Image: Joshua J. Cotten

Did you know that American alligators are one of only two alligator species in the whole world ? China is the only other place with an alligator species, the Chinese alligator. Often confused with their relatives, the crocodiles and the caimans, alligators can be differentiated by the shape of their teeth, their round snouts, their darker color, and their preference for freshwater habitats. An inhabitant of tropical and subtropical wetlands, the American alligator can be found throughout the Southeastern U.S.

2

Nene

Image: Lyle Wilkinson

Also known as the Hawaiian goose, this bird can only be found in its wild state across the islands of Maui, Kauaʻi, Molokai, and Hawaiʻi . Believed to be distantly related to the Canada goose, the nēnē is considered the rarest goose species in the world and is a protected species. Thanks to successful conservation efforts, it has been reclassified from endangered to near threatened. It has also been designated as the official state bird of Hawaiʻi.

3

Common Raccoon

Image: Chris Ensminger

If you are asked to describe a raccoon, the common raccoon, native to North America, will most likely come to mind. The other two species of raccoon—also native to the Americas—present marked differences in color and size. Their name is derived from the Algonquian aroughcoune , meaning ‘he who scratches with his hands.’ The unusual shape of their thumbs, combined with their cleverness, allows them to open closed containers to access food and trash, which has earned them the nickname of "trash pandas." Due to human intervention, they have become a highly invasive species in European and Asian ecosystems.

4

Monarch Butterfly

Image: Alex Guillaume

One of the most recognizable butterfly species, the Monarch can be identified by its orange and black wings with white spots . Monarch subspecies can be found across the Americas, but the North American monarch is especially known for its remarkable migratory behavior. As winter approaches, monarch butterflies in the northern United States travel thousands of miles to overwintering sites in California and central Mexico. In spring, they will return home in time for summer.

5

North American Beaver

Image: Tim Umphreys

Though North American beavers are related to those found in Asia and Europe, their genetics are so different that they are unable to mix. North American beavers are generally larger and darker than their Eurasian counterparts , and they have a broader and longer tail. They are a widespread species across the Continental U.S., Canada, and northern Mexico and have been chosen as the official state mammal of Oregon and New York.

6

Bald Eagle

Image: Mathew Schwartz

Widely recognized as a national U.S. symbol and featured in multiple official imagery , the bald eagle came close to extinction in the late 20th century. Found across most of North America, it favors habitats near large bodies of water. Fun fact: bald eagles were named after the color of their head feathers, as the word ‘bald’ was anciently used for ‘having a white head.’

7

Alligator Snapping Turtle

Image: U.S. Fish and Wildlife Service Southeast Region, Public domain, via Wikimedia Commons

Like the reptile it takes its name from, this pointy reptile is only found in freshwater habitats across the U.S. The spiky ridges on its shell give it an armored tank appearance, but these will flatten as the turtle ages. They have an extremely powerful bite , and they have been known for biting human fingers off, which makes them a dangerous animal that should be approached with caution.

8

Texas Blind Salamander

Image: Ryan Hagerty/USFWS, Public domain, via Wikimedia Commons

Unlike other entries on this list, this amphibian can only be found in a very specific place: San Marcos, Texas . Considered to be a critically endangered species, the Texas blind salamander lives in underground caves and streams and is highly sensitive to water pollution and droughts.

9

Coyote

Image: Dylan Ferreira

Also known as the American jackal or prairie wolf, the coyote fulfills a key role in North American ecosystems by helping regulate the population of smaller animals and consuming carrion that could otherwise spread disease. Somewhat friendly toward humans, coyotes play an important role in Native American folklore, and there are recorded cases of domesticated coyotes.

10

Giant Kangaroo Rat

Image: Harrison, George, Public domain, via Wikimedia Commons

Although kangaroos are native to Australia, giant kangaroo rats are found only in California . Preferring dry, sandy habitats that allow them to dig burrows, these rodents are known for using foot stomps as a way of communicating. Due to habitat loss caused by agriculture, the giant kangaroo rat has been classified as an endangered species.

11

American Mink

Image: Alexandre Daoust

American minks can be found across Alaska, Canada, and the northern and central United States, both in the wild and on farms. Although they are not specifically bred to be tame, they are officially considered suitable to be pets if trained from a young age. Their introduction to many parts of Europe, Asia, and South America has harmed native species, and they have been classified as invasive in many of these regions.

1

Migratory frenzy

Image: George Henry Burgess, Public domain, via Wikimedia Commons

The California gold rush triggered one of the largest mass migration waves in US history, with an estimated 300,000 people moving to the West Coast in just a few years . On January 24, 1848, a carpenter called James W. Marshall found gold at a sawmill in Coloma. The news reached the East Coast in August and, in December, President James Knox Polk officially confirmed it to Congress.

As a result, by early 1849, thousands of would-be prospectors —known as the ‘49ers’— started flooding the state every day. In January 1848, San Francisco had 800 residents; by the end of 1850 it had some 25,000 , many of them living in shacks and tents. Although most of the newly arrived were Americans, the gold rush attracted people from other parts of the world like Latin America, Europe, Australia, and Asia. Thanks to this boom, California started to grow fast, building new roads, towns, churches, schools, and hospitals.

2

No place for a lady?

Image: Popular Graphic Arts, Public domain, via Wikimedia Commons

People in the 19th century considered the California goldfields lifestyle a bit too harsh for women, so there is not much testimony of them being involved in gold-digging . Only 700 of the 40,000 people who arrived by ship to the San Francisco Bay in 1849 were women. Some came with their husbands and families, but others were just seeking adventure.

Many of the few women living in California around this time were widows. Men frequently died in mining accidents, disputes, and diseases and the women would be left alone and in need of a job. During the gold rush, women ran profitable businesses like sewing, laundry, food preparation, and boarding houses. Others would be in high demand to work in brothels and saloons, serving drinks to the hundreds of lonely gold diggers.

3

Millionaires overnight

Image: Hans

Well, not exactly overnight, but pretty quickly. Brothers John and Daniel Murphy were two adventurous early California pioneers who got into the history books for having mined about $1.5 million —around $56 million today— worth of gold in a year. Within a very short period of time, they became prosperous men and influential figures in the area.

The town of Murphys —about 140 miles East of San Francisco— is named after them and is considered one of the oldest and most important of all the Gold Rush camps in the Golden State . Nowadays, this charming little town is a must-stop for tourists on their way to the mountains looking to travel back in time.

4

Blue Jeans become popular

Image: SwellMap, Public domain, via Wikimedia Commons

In 1853 a Jewish peddler called Levi Strauss arrived in California looking for sale opportunities derived from the Gold Rush. Does the name ring a bell? A couple of years later, with the help of a tailor called Jacob Davis, he invented the garment of choice for Forty-Niners and cowboys: the blue jeans . By the end of 1873, thousands of San Franciscans were wearing these iconic durable pants, and the name "Levi's" was registered as a trademark.

Although Levi Strauss didn't exactly get rich by mining gold, he found a way to earn a fortune from it. Blue jeans —originally called "waist-high overalls"— came to represent the untamed American West. Over the years, not only workers would adopt them: kids, women, and even Hollywood stars owned at least a pair. And now, over a century and a half later, blue jeans are still an international symbol of youth, freedom, and independence .

5

The first international financial crisis

Image: Zlaťáky.cz

In just a few years, the 1849-1855 Gold Rush radically transformed California, the United States, and the world. The influx of gold served as an accelerant for U.S. economic development and enabled massive investment in public buildings, schools, and the construction of a railroad across the country. However, by the mid-1850s the world economy was so interconnected that any event could cause an international crisis.

In 1857, a crash in British banks, the speculation on railroad stock, and the sinking of SS Central America —a ship transporting a huge amount of gold—, among other incidents, triggered the first international financial crisis, known as the "Panic of 1857" . As a result, the northern domestic economy took a significant hit. However, by 1859, the Panic began to level off, and the economy began to stabilize.

6

Mark Twain struck literary gold

Image: unattributed, Public domain, via Wikimedia Commons

Did you know that one of the greatest American authors became a writer after failing as a gold miner? Samuel Clemens —a.k.a. Mark Twain—, was only one of the thousands of men who moved West during the Gold Rush in hopes of making a fortune . In 1861 he followed his brother Orion all the way to Virginia City, Nevada where he became a miner. Things didn’t go very well so he ended up working for the local newspaper, and started using the pen name by which he is remembered to this day.

Twain moved to San Francisco in 1864 and came in contact with other writers like Bret Harte and Artemus Ward. His experience in the American West inspired several of his works , such as The Celebrated Jumping Frog of Calaveras County (1865) —which brought him national attention— and Roughing It (1872). Although he didn’t become rich finding gold, Twain made a substantial amount of money through his writing.

7

Who really got rich?

Image: Unsplash

As romantic as it may sound, migrating to a new land to find gold and get rich does not necessarily mean instant success. In fact, only a few made their fortune mining gold . For most of the Forty-Niners, arriving in California during the rush was synonymous with disappointment. The lucky minority that found some gold went on expensive trips or wasted their money on poor-quality alcohol and food at the saloons of the American West, becoming broke pretty quickly.

The people who actually managed to amass some wealth during the California Gold Rush were the ones who took advantage of the opportunities surrounding the growth of cities and the financial bubble . For example, entrepreneurial merchants would open businesses to satisfy the demands of the newly arrived prospectors. America’s greatest industrialists, on the other hand, became millionaires by investing in real estate or the new railroads. Besides, in the years following the rush, mining was no longer done by adventurous individuals, but by big companies with new technology.

8

A city built out of ships

Image: G.F. Nesbitt & Co., printer, Public domain, via Wikimedia Commons

In the mid-19th century, a great number of ships arrived in California from all over the world packed with people in search of fortune. At the same time, the gold rush brought rapid growth and San Francisco soon became one of the world's great seaports, dominating shipping in the American West. These gold-seekers didn’t exactly have a return ticket, so lots of boats started to pile up on the Bay .

A few of these approximately 500 abandoned ships were sunk or buried and now can be found beneath the Embarcadero and Financial District . Others were repurposed to serve as storeships, saloons, and hotels, or their debris was used to build houses, jails, and banks. Even today, archeologists continue to discover fragments and entire ships underneath the streets of San Francisco.

9

Death Valley, a winter tragedy

Image: Marina Šurniene

Do you know where the "Death Valley" name comes from? This desert valley in the northern Mojave Desert, in Eastern California, is thought to be the hottest place on Earth. However, it was not named after its summer temps but for a winter disaster. It was a group of prospectors who got lost looking for a shortcut to the goldfields of California in the winter of 1849-1850, that gave Death Valley its grim name.

Even before the Gold Rush, California attracted settlers searching for a new life. In 1846, a group of pioneers known as the Donner Party became snowbound and nearly half of them eventually died of starvation and exposure. A few years later, although scared and forewarned by this experience, a new group ventured across the desert. While this time around the journey was not so deadly, they suffered a few mishaps that led them to nickname the area Death Valley.

10

Found gold? Have yourself a Hangtown Fry!

Image: Ivan Shemereko

According to the legend, this famous omelet cooked with bacon and topped with fried oysters was created in El Dorado Hotel in Hangtown —today’s Placerville— after a prospector claimed to have found gold. To celebrate, he demanded to be served expensive food, so the cook put together a dish with the fanciest ingredients he had at hand: eggs were delicate and therefore very valuable; bacon was shipped from the East Coast; and oysters were brought fresh from San Francisco, over 100 miles away.

Since then, the Hangtown Fry has continued to be served at many of the local restaurants . Although now you can find versions with onions, bell peppers, and spices, this iconic dish has remained practically the same as it was during the Gold Rush more than a century and a half ago. Have you tried it?

1

Leaving with your bike in the morning and coming back for suppertime

For a few generations of American kids, a bicycle meant freedom. From the 1940s through the 1980s, children often left home after breakfast with little more than a vague instruction: "Be back before dinner."

Neighborhoods were informal safety nets, and kids were free to navigate them without phones or GPS trackers.

2

Foraging fruit from neighbors’ yards

It was a risky gamble: Picking and eating fruit from unknown plants in your neighborhood could result in a yummy treat…or abdominal trouble.

There was a time when kids freely grabbed berries, apples, or other fruit growing along sidewalks or in neighbors’ gardens. Today, property boundaries have grown, and kids are reminded not to forage without permission.

3

Riding public transportation alone

For much of the 20th century, it wasn’t unusual for children as young as 7 to ride buses, subways, or streetcars alone, especially in large cities like New York, Chicago, and Boston.

Kids commuting to school independently was considered a practical life skill. Parents expect children to learn responsibility through real-world experience , handling routes, change, and unexpected delays.

4

Roller coasters had no belts and no headrests

Do you have memories of rickety rollercoasters? You might correctly remember that earlier rides were thrilling in ways that might give modern safety inspectors pause.

Many of the rides made popular in the 50s relied primarily on simple lap bars and operated with minimal restraints. Designers assumed riders would hold on tightly. Safety rules have evolved drastically since then, and now we have over-the-shoulder harnesses and improved lap restraints.

5

Walking miles to a friend’s house alone

Kids routinely walked long distances across neighborhoods or even between towns without adult accompaniment, guided by landmarks and memory. While this independence helped build confidence, it also reflected a different perception of risk.

6

Not ringing the bell: just yelling your friend’s name from outside

Before texting "I’m here" or coordinating playdates through apps, kids often announced their arrival the old-fashioned way: by standing outside and shouting a friend’s name.

Front yards, sidewalks, and porches acted as social hubs where everyone recognized familiar voices. As concerns about privacy, safety, and structured schedules grew with the years, the casual shout-from-the-street culture slowly disappeared.

7

Spending long days at the beach without adults

Surf culture in places like California and Hawaii, as well as East Coast boardwalk towns, normalized groups of kids swimming, riding the waves, and returning home only at sunset.

Public beaches were seen as community environments where lifeguards and familiar locals provided informal oversight . Today, increased safety standards, liability concerns, and changing parenting norms mean most children visit beaches with close adult supervision.

8

Exploring woods alone

Few children who lived near a forest or rural area could resist the pull to explore it, either alone or with friends. Building forts, climbing trees, and learning their way around nature were influenced by scouting movements and postwar ideas about resilience and independence.

Psychologists today even describe this kind of unstructured outdoor play as beneficial for creativity and risk assessment skills. However, modern concerns about safety, traffic, and environmental hazards have reduced opportunities for unsupervised exploration.

9

Staying home alone or being babysat by older siblings

The rise of the "latchkey kid" became especially visible in the United States during the 1970s and 1980s, when increasing numbers of dual-income households, or single-parent homes, meant children returned home from school to empty houses.

Many kids carried house keys, prepared snacks, and entertained themselves until their parents finished work. Today, research on changing childhood independence shows that unsupervised play and autonomy have significantly declined compared to previous generations.

10

Collecting glass bottles for some cents back

Long before recycling bins appeared on every curb, kids learned about value through bottle returns. Soda and milk bottles carried deposits, and children would collect empties from their own homes or even from neighbors to trade for a few coins at local stores.

It was a first taste of earning money independently, although it often funded candy purchases or comic books.

11

Climbing trees or rooftops, unsupervised

When you are a kid, climbing a tree is decidedly an adventure. There was a time when this was considered a universal childhood activity in America, even encouraged as a playful challenge, since mid-century parenting often embraced manageable risk.

But current safety standards and greater awareness of injury risks have dramatically reduced these kinds of unsupervised play environments.

12

Casually hanging out in abandoned buildings

Another tempting area for children happened to be empty lots, half-built structures, and abandoned buildings . It was difficult to keep out curious and brave kids. This pastime is not entirely eradicated today, although it seems to be teenagers or young adults who engage in it.

13

Riding in cars without seatbelts

For decades, families piled into cars without buckling up, simply because seatbelts weren’t standard equipment. Although basic seatbelt designs existed earlier, widespread adoption didn’t begin until the late 1950s and 1960s.

Even then, many Americans resisted using them, seeing belts as unnecessary or uncomfortable . Laws requiring seatbelt use didn’t become common until the 1980s and beyond, meaning generations of kids grew up riding freely in the back seat.

14

Playing in flooded streets after a storm

Children once treated flooded streets like temporary playgrounds. Heavy rain expanded the available activities for a suburban child. They could splash barefoot through puddles or float makeshift boats down rushing gutters.

Over time, public health campaigns highlighted dangers such as contaminated runoff, hidden debris, electrical hazards, and traffic risks. Enough to scare modern parents!