Why Crows Hold Noisy Funerals for Their Fallen Friends

iStock
iStock

The next time you hear a murder of crows cackling for no apparent reason, show a little respect: You may have stumbled onto a crow funeral. Crows are among the few animals that exhibit a social response to a dead member of their species. Though their caws may sound like heartbroken cries, such funerals aren't so much about mourning their fallen friends as they are about learning from their mistakes.

In the video below from the PBS series Deep Look, Kaeli Swift, a researcher at the University of Washington's Avian Conservation Lab, investigates this unusual phenomenon firsthand. She familiarized herself with a group of crows in a Seattle park by feeding them peanuts in the same spot for a few days. After the crows got used to her visits, she returned to the site holding a dead, taxidermied crow and wearing a mask and wig to hide her identity. The crows immediately started their ritual by gathering in the trees and crying in her direction. According to Swift, this behavior is a way for crows to observe whatever might have killed the dead bird and learn to avoid the same fate. Flocking into a large, noisy group provides them protection from the threat if it's still around.

She tested her theory by returning to the same spot the next week without her mask or the stuffed crow. She offered the crows peanuts just as she had done before, only this time the birds were skittish and hesitant to take them from her. The idea that crows remember and learn from their funerals was further supported when she returned wearing the mask and wig. Though she didn't have the dead bird with her this time, the crows were still able to recognize her and squawked at her presence. Even birds that weren't at the funeral learned from the other birds' reactions and joined in the ruckus.

Swift was lucky this group of crows wasn't particularly vengeful. Crows have been known to nurse and spread grudges, sometimes dive-bombing people that have harmed one of their own.

[h/t Deep Look]

5 Times the Jig Was Up Because the Parrot Squawked

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iStock

Most of our feathered friends can sing, but only a few can talk. And if those talkers witness something naughty, they might just tell on you.

1. SUSPICIOUS SWEET TALKING

A woman in Kuwait, where adultery is illegal, had been suspicious for some time that her husband was carrying on an affair with their housekeeper. There were little signs, like when she returned home from work early and noticed that he seemed nervous. But it was when the family parrot squawked unfamiliar sweet nothings that she decided to take her suspicions to the police. If her husband wasn’t saying those things to her, how was the parrot learning them? However, because it could not be proven that the parrot hadn’t heard the phrases from a steamy TV show, the bird's evidence was deemed inadmissible.

2. THAT'S NOT MY NAME

In another case of infidelity revealed with a squawk, a man was surprised to hear his beloved African Grey parrot Ziggy say, “Hiya Gary!” when his live-in girlfriend’s phone rang, because his name was not Gary. After he heard the parrot say, “I love you, Gary,” and make kissing sounds when the name Gary was said on TV, he confronted his girlfriend, who admitted she was having an affair with Gary. Not only did he lose his girlfriend, but when the parrot continued to chatter on about Gary in her voice, the man was forced to give his pet up too.

3. THE AWFUL LAST LAUGH

Even when other evidence is already damning, a parrot can add an extra sinister twist to a crime investigation. When an elderly woman was found in a filthy South Carolina home, covered in bedsores and near death, her daughter was charged with elder abuse and neglect (her mother died the next day). The police noted that a parrot in the house repeatedly cried for help and then laughed. They believe it was mimicking the interaction between the mother and daughter: The mother pleading for help and the daughter laughing.

4. REPLAYING THE LAST WORDS

After a Michigan man was found shot to death in his home, his parrot kept repeating a dialogue, alternating between a man and woman’s voice, that went: “Get out.” “Where will I go?” “Don’t f***ing shoot!” His wife—who police believe tried to kill herself but did not succeed—was charged with his murder and was convicted in 2017.

5. GIVING THE CRIMINAL AWAY

Tales of parrots giving the criminal away go back to the 19th century, when the leader of a Paris crime syndicate who went by Victor Chevalier escaped with his beloved parrot from the residence he shared with his wife Marie before the cops descended on him. When an officer was called to another residence for a seemingly unrelated search, he heard as he walked in, a parrot cry out “Totor! Riri!” which happened to be the pet names of Victor and Marie. The discovery of the parrot eventually led to the capture of Victor.

This piece originally ran in 2016.

Scientists Reveal the Most Comprehensive Map of Butterfly Evolution Ever—and It's Gorgeous

Espeland et al., Current Biology (2018)
Espeland et al., Current Biology (2018)

There are 18,000 known butterfly species in the world, so maybe it’s not surprising that scientists haven’t quite worked out how they’re all related. Recently, scientists developed what is currently the most comprehensive roadmap of butterfly evolution ever, one that includes 35 times more genetic data and three times as many classifications as past butterfly evolutionary trees. Oh, and as Fast Company found, it’s beautiful.

The study, published in Current Biology, drew on genetic data from 207 butterfly species that together represent 98 percent of butterfly tribes (the classification just above genus). Led by Florida Museum of Natural History curator Akito Kawahara and Marianne Espeland of the Alexander Koenig Research Museum in Germany, the study used this genetic data and the fossil record to trace the evolution of different butterfly species and figure out when different species split off from their cousins.

A circular visualization of the butterfly family tree
Espeland et al., Current Biology (2018)

Needless to say, millions years of evolution means a lot of information to visualize in one family tree. Each bold label on the very outside of the circle represents a tribe, like Tagiadini, followed by the individual species that made it into the study, like Tagiades flesus (the clouded skipper). Species are clumped together by subgroup—in this case, Pyrginae (spread-winged skippers)—and color-coordinated by family—in this case, Hesperiidae (skippers).

The solid gray circle near the center, labeled K-PG boundary (for Cretaceous–Paleogene boundary) represents the mass extinction event that killed off most of Earth’s plant and animal species, including the dinosaurs.

A close-up of a circular visualization of the butterfly family tree
Espeland et al., Current Biology (2018)

The study confirms several pieces of information that butterfly experts had hypothesized about in previous studies, while overturning other hypotheses. Butterflies can be divided into seven different families, and though previous research estimated that the first butterflies appeared around 100 million years ago, this study pushes that date back to around 120 million years ago. But there were just a few early ancestors of butterflies prior to the mass extinction event that wiped out the dinosaurs, after which the butterfly family tree explodes into different branches.

Swallowtail butterflies (the subfamily Papilioninae, to the left in blue) were the first butterfly family to branch off, so they’re a “sister” species to all other butterfly species. Skippers (the family Hesperiidae, in purple) likely branched off next, then nocturnal butterflies like the Hedylidae family (in gray). However, some species that scientists previously thought were sister groups do not, in fact, share common ancestry, including swallowtails, birdwings, zebra swallowtails, and swordtails. The timeline shows that some butterfly species seem to have evolved together along with the plants they feed on or, in some cases, ant species with which they now have a mutually beneficial relationship.

[h/t Fast Company]

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