THE NUMBER OF MONARCH BUTTERFLIES THROUGHOUT THE UNITED STATES HAS DWINDLED OVER THE PAST FEW DECADES. At Pismo Beach, California, one the largest of colonies in North America, volunteers counted 24,000 butterflies in November 2022. About 25 years ago, that number was closer to 100,000.
Scientists say that while climate change is a problem for monarchs, their biggest threat is disappearing milkweed. Milkweed plants are important to monarchs. Caterpillars munch only milkweed, while butterflies sip nectar from milkweed and a variety of other flowers. When it comes time to lay eggs, only milkweed leaves will do.
But there are fewer milkweed plants in North America for monarchs. Milkweed is destroyed when open fields are plowed to make way for new neighborhoods.
この記事は Muse Science Magazine for Kids の March 2023 版に掲載されています。
7 日間の Magzter GOLD 無料トライアルを開始して、何千もの厳選されたプレミアム ストーリー、9,000 以上の雑誌や新聞にアクセスしてください。
すでに購読者です ? サインイン
この記事は Muse Science Magazine for Kids の March 2023 版に掲載されています。
7 日間の Magzter GOLD 無料トライアルを開始して、何千もの厳選されたプレミアム ストーリー、9,000 以上の雑誌や新聞にアクセスしてください。
すでに購読者です? サインイン
Who's Your Cousin?
The great apes are among the most popular animals in most zoos. Their actions, facial expressions, and family life remind us so much of ourselves. Have you ever wondered, though, how we might look to them?
Is it possible to die of boredom?
To figure out if we can die of boredom, we first have to understand what boredom is. For help, we called James Danckert, a psychologist who studies boredom at the University of Waterloo in Canada.
THE PROBLEM WITH PALM OIL
Palm oil is all around you. It’s in sugary snacks like cookies and candy bars. It’s in lipstick and shampoo and pet food.
SERGE WICH
Serge Wich’s favorite days at work are spent out in the forest, studying orangutans in Sumatra and Borneo or chimpanzees in Tanzania.
ELODIE FREYMANN
When you’re feeling sick, it probably doesn’t occur to you to try eating tree bark.
Guardians of the Forest
EARLY, MAKESHIFT WILDLIFE DRONES HELPED TO DETECT AND PROTECT ORANGUTANS.
APE ANTICS
The Whirling World of primate play
Dr. Ape Will See You Now
HUMANS AREN’T THE ONLY PRIMATES THAT USE MEDICATION.
THE LEFT OVERS
A lot has happened for modern humans to get to this point. We lost most of our hair, learned how to make tools, established civilizations, sent a person to the Moon, and invented artificial intelligence. Whew! With all of these changes, our bodies have changed, too. It’s only taken us about six million years.
SO, WHAT IS A PRIMATE?
What do you have in common with the aye-aye, sifaka, siamang, and potto? If you said your collarbone, you re probably a primatologist—a person who studies primates. If you’re not, read on.
