Crows Form, Nurse, and Share Grudges Against People

Walter Siegmund via Wikimedia Commons // CC BY 2.5
Walter Siegmund via Wikimedia Commons // CC BY 2.5

Consider this a friendly reminder not to antagonize crows: According to a 2011 study in Proceedings of the Royal Society B, American crows remember the faces of people who wrong them, and enlist other birds to attack the offenders.

When it comes to intelligence, birds get no respect. For a long time, scientists assumed birds were stupid because their brains had significant differences from ours. But recent studies on bird brains and abilities are putting those fallacies in their place. Researchers have found sophisticated behavior in birds from finches and pigeons to Antarctic gulls. But there’s one group of birds that consistently amazes: crows and ravens.

Within the last 10 years we’ve learned that crows can make, store, and care for tools. They can count and exercise self-restraint. They can use bait to catch fish. They can certainly play. And, the authors of the Royal Proceedings study say, they can nurse some serious grudges.

Researchers at the University of Washington’s School of Forest Resources bought two masks that looked like human faces. A caveman-looking mask was designated the “dangerous” mask, while a Dick Cheney mask was “neutral.” They then visited wild crows at five sites around Seattle. At each site, the person wearing the caveman mask would approach the crows, trapped a few, banded their legs, and set them free—an experience the birds did not enjoy. As soon as the researcher let them go, the birds began yelling at their captor with a harsh, aggressive cry called “scolding.”

The sounds of conflict attracted more birds, which joined in scolding and attacking the researcher, even though they’d never met. “The mob of two to 15 birds hounds us, sometimes diving from the sky to within a few meters or less. This pursuit lasts about 100 meters (328 feet) as we walk away,” crow expert John Marzluff told Discovery News.

The Dick Cheney mask did not elicit a response.

Marzluff and his colleagues then traveled to other crow territories. The sight of the caveman mask caused an immediate ruckus among these crows—even though none of them had ever been caught or banded. Crows up to a mile away from the original site had heard about this no-good caveman guy, and they knew he was trouble when he walked in.

The grudge didn’t wear off, either. Marzluff said return trips in the caveman mask provoked the same hostile response, even five years later. He told Discovery News, "Individual crows that are adults can live 15-40 years in the wild (most die when young, but those that make it to adulthood can live a long time) and they probably remember important associations they have formed for much of their lives."

These associations aren't all negative. An 8-year-old girl, also in Seattle, made news last year when her family revealed that local crows had pretty much made her their queen.

12 Perfectly Spooky Halloween Decorations Under $25

Amazon/shopDisney
Amazon/shopDisney

Halloween is right around the corner—which means it’s officially time to bring out the jack-o'-lanterns, watch scary movies, buy your costume(s), and hang up your festive decorations. Although there are thousands of decorations to choose from, you don’t have to blow your budget while decking out your house or apartment in honor of the spooky season this year. With a little guidance, you'll find plenty of ways to create the perfect ambiance at home without going for broke. (And best of all, you can put the money you saved toward extra Halloween candy to stash away.)

From giant spiders to hanging ghosts and lawn decorations, here are a few of our favorite props under $25.

1. Halloween Pillow Covers (4-Pack); $17

ZJHAI/Amazon

These adorable Halloween-themed pillowcases make the perfect accessory for any couch, sofa, or mattress. Made with thick linen fabric, these are durable, sturdy, and designed to last for seasons to come. (Tip: To prevent the zipper from breaking, fold the pillow in half before inserting.)

Buy it: Amazon

2. Black Lace Spiderweb Fireplace Mantle; $12

Aerwo/Amazon

This versatile spiderweb prop is made with 100-percent polyester, and its knit lace spiderweb pattern adds a spooky touch to any home. Display it on your doorway, across your fireplace mantel, or atop your table. (It also makes a great backdrop for Halloween photo ops.)

Buy it: Amazon

3. Statement Halloween Signs; $16

Dazonge/Amazon

These festive, statement-making banners come pre-assembled, making them incredibly easy to install. They’re also weather-resistant and washable for both outdoor and indoor use. Use tape, push-pins, or weights to prevent the signs from blowing away.

Buy it: Amazon

4. Jack Skellington and Sally Plush Dolls; $23 (Each)

Disney

Celebrate your favorite holiday with a pair of adorable Jack Skellington and Sally plush dolls from Tim Burton’s The Nightmare Before Christmas. Jack stands at 28 inches tall, while Sally is a bit shorter at 21 inches. Set them up on your sofa or against the window sill for all to see.

Buy them: Disney Shop (Jack and Sally)

5. Halloween Zombie Groundbreaker; $22

Joyin/Amazon

This spooktacular zombie lawn decoration is sure to scare all of your friends, family, and neighbors alike. Made with a combination of latex, plastic, and fabric, this durable Halloween prop is sure to last for years to come.

Buy it: Amazon

6. Hanging Ghost Decoration; $14

Moon Boat/Amazon

Drape this handmade, 14-foot-long hanging ghost decoration over your porch, doorway, or window. You can also hang it outdoors over a tree or a (very tall) bush. And, since it comes pre-assembled, you won’t have to waste time constructing it yourself.

Buy it: Amazon

7. Two-Piece Hanging Ghost Set; $17

GeeFuun/Amazon

This pair of ghosts adds a whimsical touch to any home. While they’re not “scary,” per se, they certainly are adorable. Display them in your front yard, on your porch, on a lamppost, or a tree. To hang, simply tie the ribbons and bend the wires, arms, and tails.

Buy it: Amazon

8. Pumpkin String Lights; $19

Eurus Home/Amazon

Not only are these solar-powered, 33-foot-long LED string lights good for the environment, they’re also incredibly easy to install (no long, tangly power cable chords necessary). Since they’re waterproof, you can use them both indoors and outdoors. Choose from eight different light settings, including twinkling, flashing, fading, and more.

Buy it: Amazon

9. Inflatable Ghost; $22

Joiedomi/Amazon

This adorable inflatable ghost (which dons a cute-as-can-be wizard hat!) features built-in LED lights and sandbags to help it stay sturdy. It also comes complete with a plug, extended cords, ground stakes, and fastened ropes. Simply plug it in and watch it magically inflate within just a few minutes.

Buy it: Amazon

10. Graveyard Tombstones; $17

meiguisha/Amazon

Turn your front lawn into a graveyard with this six-piece set. Each tombstone is made with foam and designed to add a touch of spookiness to your space. To install, insert one holder into the bottom of the tombstone, and one into the soil. You can use these indoors, as well.

Buy it: Amazon

11. 10-Piece Skeleton Set; $24

Fun Little Toys/Amazon

This skeleton set includes a skull, hands and arms, and legs and feet—plus five stakes to hold everything in place. Each “bone” and “joint” is flexible, allowing you to prop the skeleton into different frighteningly fun poses. Simply place the stakes into the bone socket and turn clockwise.

Buy it: Amazon

12. Outdoor Spider Web; $18

amenon/Amazon

This giant, ultra-stretchy spider web spans a whopping 23 feet. It also includes a 30-inch black spider, 20 pieces of fake spiders, one hook, and one nail. Its thick polyester rope—combined with the sturdy stakes—allows the spider web to stay in place all season long. Place the hook on a wall or tree, and expand the web using the stakes.

Buy it: Amazon

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Drop Everything! Fat Bear Week Has Arrived in Alaska’s Katmai National Park

Lefty, last year's Fat Bear Week runner-up.
Lefty, last year's Fat Bear Week runner-up.
Katmai National Park, Flickr // Public Domain

Each autumn, Katmai National Park in Alaska celebrates ursine obesity in the best way possible: by holding a week-long competition to determine which bear is the fattest.

Since park rangers can’t exactly ask a wild brown bear to stand on a scale, it’s less about how much the bears might weigh and more about how much larger they’ve gotten since the spring. According to explore.org, which hosts the online event, the bears will drop about one-third of their body weight while hibernating over the long winter. In order to survive those months without any food or water, they spend the summer scarfing down all the salmon (and other sustenance) they can get their paws on. By early October, they’re gloriously corpulent—and it’s up to you to decide which one deserves to be the champion of this year’s Fat Bear Week.

Every day between now and October 6, Katmai National Park will post one or two new bear-vs.-bear matchups—the first at 12 p.m. EDT and the second at 4 p.m. EDT—and ask the public to vote for the bear they want to see advance to the next round of the single-elimination tournament. Each entry includes a photo of the bear from June or July and another from the last few weeks, so you can easily see how much they’ve ballooned.

You can learn about the bears on the “Meet the Bears of Fat Bear Week” page, and you can also try to spot them for yourself on explore.org’s livestreams. Once you’ve chosen your favorite, you can see which competitor they might face next on the bracket. Last year’s winner, Holly, is defending her title, but she might have a conflict of interest—this year, her cub is competing, too. If Holly wins her next round, and her cub wins her next two rounds, mother and daughter could battle it out in the semifinals on Monday, October 5.