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Guy Built A Bird Feeder That Accepts Bottle Caps For Food, And These Wild Magpies Love It
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Guy Built A Bird Feeder That Accepts Bottle Caps For Food, And These Wild Magpies Love It

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It’s mind-blowing to see animals learn meaningful tricks. Sure, a dog who can bring you a beer from the fridge is awesome too, but in today’s world, you gotta start thinking bigger than that.

Hans Forsberg works with robotics on industrial applications for artificial intelligence and had an idea on how he could put his knowledge and the family of wild birds living in his backyard to good use.

So, he trained the friendly neighborhood magpies to recycle bottle caps in exchange for food using a machine he built from scratch.

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Magpies are pretty smart as birds go—so smart in fact that they now set an example with recycling trash

Image credits: Hans Forsberg

Hans has a backyard that’s home to a pair of magpies who have been living there for what seems like ages at this point. One day, Hans noticed how the curious little critters started finagling with the complex locks on his outdoor lanterns. And then a thought occurred.

The magpies were looking for paraffin candles inside the lanterns—because why not, just like crows, they love stealing—but Hans figured that these birds could quite possibly carry out more meaningful tasks.

So, he decided to build a machine with the help of which he would train the birds to collect trash around his garden in exchange for food. This was not only a fresh new project for him, but it seemed that nobody else had tried to do anything like this before as there were no how-tos on the internet, so it was all up to him.

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Computer scientist Hans Forsberg built a machine that dispenses food in exchange for bottle caps

Image credits: Hans Forsberg

Whenever a magpie drops a bottle cap into the designated hole, it gets a treat from the dispenser

Image credits: Hans Forsberg

The project itself included several key components and processes. First there’s the dispenser, which is filled up with food, like peanuts and animal kibble. Whenever a piece of trash—in this case, a bottle cap—is deposited into a receptacle, it gives out one or two pieces of food.

Once an offering is given, the food is dispensed and falls down through a tube and a funnel that’s connected to a base with a small compartment where the bird can retrieve it.

The main box contains a Raspberry Pi system with a camera to monitor everything and there are also electronics and detectors hooked up below the table that the machine rests on to process and trigger the dispensation of food.

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Over several years, he taught the neighborhood magpies to recycle bottle caps littered around the neighborhood

Image credits: Hans Forsberg

The adult magpies are cautious, but the young ones are keen on keeping the environment clean

Image credits: Hans Forsberg

The project is actually much more complicated than what is said here as it also involves vibrating motors, a number of very particular moving parts in the dispenser, and even its own graphic user interface to log the progress and status of the bird box. For more details, you can read up on it in his story on Hackster.

Turns out, this project has been running for several years as it’s not that easy to train magpies to pick up trash. Hans explained that he first had to get the birds interested in the feeder, to feed them regularly, and to persuade them to visit him during their patrols.

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It was also a bit of a challenge every time there was the slightest change in the rig as the adult magpies were suspicious and cautious of everything. Good thing all of this changed when they had offspring. The chicks are braver in approaching the machine and partaking in this elaborate recycling scheme.

In the future, he hopes to teach them to pick up other kinds of trash, like cigarette butts

Image credits: Hans Forsberg

Check out the videos of the friendly magpies cleaning up the neighborhood

Image credits: Hans Forsberg

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Image credits: Hans Forsberg

At this point, there is one chick who has fully figured out how the system works and has been hard at work collecting bottle caps to trade for food. His siblings are more mischievous about it as they tend to steal the rewards from underneath the hard working magpies’ beaks.

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He hopes to move on to other bigger and better things than bottle caps—to train the birds to pick up fallen fruit, cigarette butts, and other things in his backyard as well as the entire neighborhood. Maybe this will finally put litter bugs to shame knowing that even animals partake in recycling.

Hans also made a brief explanation video of the food dispenser

Image credits: Hans Forsberg

What are your thoughts on this? Let us know in the comment section below!

Here’s what the internet had to say about this

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Robertas Lisickis

Robertas Lisickis

Author, BoredPanda staff

Read more »

Some time ago, Robertas used to spend his days watching how deep the imprint in his chair will become as he wrote for Bored Panda. Wrote about pretty much everything under and beyond the sun. Not anymore, though. He's now probably playing Gwent or hosting Dungeons and Dragons adventures for those with an inclination for chaos.

Read less »
Robertas Lisickis

Robertas Lisickis

Author, BoredPanda staff

Some time ago, Robertas used to spend his days watching how deep the imprint in his chair will become as he wrote for Bored Panda. Wrote about pretty much everything under and beyond the sun. Not anymore, though. He's now probably playing Gwent or hosting Dungeons and Dragons adventures for those with an inclination for chaos.

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Colin L
Community Member
4 years ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

I think I heard of a similar setup teaching crows to pick up cigarette butts. I somehow suspect that there would be considerably morr of those (and that it may be riskier for the crows).

FloC
Community Member
4 years ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

It might be a better idea to teach the crows to shlt on the smokers who don't throw their cigarette butts in ashtrays but on the ground. That would be highly effective.

Load More Replies...
Quazmodic
Community Member
4 years ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

"... meanwhile, in the Savanna grasslands of Africa, Ostriches are stealing hubcaps from Jeeps."

ArhomR
Community Member
4 years ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

How many bottle caps are in this man’s yard? OBTW the Magpies don’t like the peanuts.

Lutz Herting
Community Member
4 years ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

"How many bottle caps are in this man’s yard?" This may be news to you, but Magpies can actually fly. They are able to collect bottle caps from OUTSIDE this man's yard too.

Load More Replies...
lenka
Community Member
4 years ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

This is fabulous! I hope he is feeding them appropriate food though. If the bird doesn't get the right nutrients its bones and beak will become severely damaged.

Lutz Herting
Community Member
4 years ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

For wild birds, it's not so much about the "right" food, but more about having a wide variety of different foodstuffs. As long as there are different things in that dispenser over time and given that the birds can't feed exclusively from it (one treat at a time is not enough to feed a bird), it should be fine.

Load More Replies...
A Jones
Community Member
4 years ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

This is smart. It also helps them do a different kind of "hunt" to get food.

d bradley
Community Member
4 years ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

i can't remember the last time i saw a bottle cap in the street. does he live next to a bar

GC
Community Member
4 years ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

But we're you actively looking for them? These birds, with their incredible eyesight, are actively scouting for them. Not just in the street but everywhere. I think it's a great thing.

Load More Replies...
CatScratchFever
Community Member
4 years ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

As a long term volunteer litter picker myself, I greatly admire what Hans Forsberg has achieved, I don't agree with the comments about the birds, I used to feed crows, lots of good bird food, but I stopped doing it regularly because after a while the crows lost interest, this is foraging behaviour and it could just be boring for them to get "free" food!

Lutz Herting
Community Member
4 years ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

Did you always feed the same food? Many kinds of birds get just as bored with the same meal every day as humans do.

Load More Replies...
Charlotte D.
Community Member
3 years ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

i think that you should puth, like, a little dish at the end of the spout the food comes out of because some of them seem to not notice the food...

Seabeast
Community Member
3 years ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

One year I kept finding chicken bones in my bird bath. Crows were taking bones from the dumpster out back of a chicken restaurant and bringing them to the bird bath to wash and soak the remaining meat scraps off of.

Seabeast
Community Member
3 years ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

Some birds use cigarette butts as nesting material. I don't know if they realize that the nicotine kills parasites such as lice, but natural selection means that more babies grow up from the nests without mites and other parasites, so they'd carry the habit onto the next generation.

GC
Community Member
4 years ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

I like how everyone is talking about how smart the birds are--and they are--but the guy! How amazing is he? Props.

Amazon QT
Community Member
4 years ago (edited) DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

Magpies are such intelligent birds, unfortunately we don’t get many when I live here in Washington state. But I love watching my Hummingbirds, Chickadees and occasional Blue Jay come to my bird feeders.

Tom Maiden
Community Member
4 years ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

My Mom trained our dog to retrieve our newspaper from the front yard, in exchange for a treat. One day, the dog escaped from our fenced in back yard. While he was out, he collected a stack of newspapers from our neighbors houses, and stashed them in our back yard. He must have been planning on selling them to my Mom for more treats.

Christina Uhlir
Community Member
4 years ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

These birdies deserve a raise. Who will teach irresponsible, lazy people to clean up after themselves?

Louis Ruffino
Community Member
4 years ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

Wonderful way to interact with our friends. A mutually beneficial cooperation. Please plan a supportive feeding program when we stupid humans stop generating junk like bottlecaps.

May Be
Community Member
4 years ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

Now if he could only build a machine that would teach people to pick up trash and dispose of it properly. Better yet, teach them not to trash the planet in the first place.

John Longville
Community Member
3 years ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

#haiku BIRD CAPITALISM Hope it works better for them than it does for us.

John Longville
Community Member
3 years ago

This comment section doesn't permit the line breaks used in haiku. You have to insert them in your mind. One comes after "CAPITALISM"; another after "them".

Load More Replies...
Upcoming Trends
Community Member
3 years ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

Good day I am so grateful I found your blog, I really found you by accident, while I was browsing on Bing for something else, Anyways I am here now and would just like to say thanks a lot for a marvelous post and an all-round interesting blog (I also love the theme/design), I have bookmarked it and also added your RSS feeds. I really love the information you provided about the fast and furious here. Please do keep up the fantastic job. I hope you see my article about Netnaija or Nonprofit fundraising platforms! https://www.makeoverarena.com/nonprofit-fundraising-platforms/ https://www.tecreals.com/mobiletvshows/

Molly Cule
Community Member
3 years ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

I remember a Download festival where they rewarded a full bin bag of empty cans or plastic bottles (separated recyclables) with a full can of cold beer. There were a lot of people litter-picking that year.

ebbaoruhaikekeluhe
Community Member
3 years ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

magpies are basically cleaning up after humans. i think that this is a good idea since people just won't clean up after themselves.

Siddy Das
Community Member
4 years ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

This guy pulling a tom sawyer shows how far humanity has actually come.

Maria
Community Member
4 years ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

Do only bottlecaps work? Otherwise they're quickly going to learn to throw any old thing in there!

CatScratchFever
Community Member
4 years ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

Maybe started with one bird using the hole in the feeder to stash it's new found treasure, then out pops a treat, does it again and same thing happens, over time the bird and other birds will learn this is how to get food.

Load More Replies...
BoredDragon
Community Member
4 years ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

This is cool but...I don’t think it’s a good idea to have birds carry trash around. Like, I know that they’re smart and all, but they could choke. Anyways, this is really cool.

Debbie
Community Member
4 years ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

But why does he want to pick up fruit? It is a natural thing and benefits insects and birds too. (Ofcourse don't toss out fruit on purpose or in plain sight, but fruit is organic.)

Steve Cruz
Community Member
4 years ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

Watched all his videos and didn't figure out how the magpies deduced a botle cap in the receptacle would trip the snack dispenser.

Noel Bovae
Community Member
4 years ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

Poor bird HATES those freaking peanuts! You could see his/her disappointment every time a peanut came out. 🥺

Eel Music
Community Member
4 years ago

This comment is hidden. Click here to view.

BoredPanda keeps score on beliefs just like the Chinese communists. Quit being evil. My number is crazy-low, just because I believe in God and morality

Colin L
Community Member
4 years ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

I think I heard of a similar setup teaching crows to pick up cigarette butts. I somehow suspect that there would be considerably morr of those (and that it may be riskier for the crows).

FloC
Community Member
4 years ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

It might be a better idea to teach the crows to shlt on the smokers who don't throw their cigarette butts in ashtrays but on the ground. That would be highly effective.

Load More Replies...
Quazmodic
Community Member
4 years ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

"... meanwhile, in the Savanna grasslands of Africa, Ostriches are stealing hubcaps from Jeeps."

ArhomR
Community Member
4 years ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

How many bottle caps are in this man’s yard? OBTW the Magpies don’t like the peanuts.

Lutz Herting
Community Member
4 years ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

"How many bottle caps are in this man’s yard?" This may be news to you, but Magpies can actually fly. They are able to collect bottle caps from OUTSIDE this man's yard too.

Load More Replies...
lenka
Community Member
4 years ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

This is fabulous! I hope he is feeding them appropriate food though. If the bird doesn't get the right nutrients its bones and beak will become severely damaged.

Lutz Herting
Community Member
4 years ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

For wild birds, it's not so much about the "right" food, but more about having a wide variety of different foodstuffs. As long as there are different things in that dispenser over time and given that the birds can't feed exclusively from it (one treat at a time is not enough to feed a bird), it should be fine.

Load More Replies...
A Jones
Community Member
4 years ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

This is smart. It also helps them do a different kind of "hunt" to get food.

d bradley
Community Member
4 years ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

i can't remember the last time i saw a bottle cap in the street. does he live next to a bar

GC
Community Member
4 years ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

But we're you actively looking for them? These birds, with their incredible eyesight, are actively scouting for them. Not just in the street but everywhere. I think it's a great thing.

Load More Replies...
CatScratchFever
Community Member
4 years ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

As a long term volunteer litter picker myself, I greatly admire what Hans Forsberg has achieved, I don't agree with the comments about the birds, I used to feed crows, lots of good bird food, but I stopped doing it regularly because after a while the crows lost interest, this is foraging behaviour and it could just be boring for them to get "free" food!

Lutz Herting
Community Member
4 years ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

Did you always feed the same food? Many kinds of birds get just as bored with the same meal every day as humans do.

Load More Replies...
Charlotte D.
Community Member
3 years ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

i think that you should puth, like, a little dish at the end of the spout the food comes out of because some of them seem to not notice the food...

Seabeast
Community Member
3 years ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

One year I kept finding chicken bones in my bird bath. Crows were taking bones from the dumpster out back of a chicken restaurant and bringing them to the bird bath to wash and soak the remaining meat scraps off of.

Seabeast
Community Member
3 years ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

Some birds use cigarette butts as nesting material. I don't know if they realize that the nicotine kills parasites such as lice, but natural selection means that more babies grow up from the nests without mites and other parasites, so they'd carry the habit onto the next generation.

GC
Community Member
4 years ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

I like how everyone is talking about how smart the birds are--and they are--but the guy! How amazing is he? Props.

Amazon QT
Community Member
4 years ago (edited) DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

Magpies are such intelligent birds, unfortunately we don’t get many when I live here in Washington state. But I love watching my Hummingbirds, Chickadees and occasional Blue Jay come to my bird feeders.

Tom Maiden
Community Member
4 years ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

My Mom trained our dog to retrieve our newspaper from the front yard, in exchange for a treat. One day, the dog escaped from our fenced in back yard. While he was out, he collected a stack of newspapers from our neighbors houses, and stashed them in our back yard. He must have been planning on selling them to my Mom for more treats.

Christina Uhlir
Community Member
4 years ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

These birdies deserve a raise. Who will teach irresponsible, lazy people to clean up after themselves?

Louis Ruffino
Community Member
4 years ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

Wonderful way to interact with our friends. A mutually beneficial cooperation. Please plan a supportive feeding program when we stupid humans stop generating junk like bottlecaps.

May Be
Community Member
4 years ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

Now if he could only build a machine that would teach people to pick up trash and dispose of it properly. Better yet, teach them not to trash the planet in the first place.

John Longville
Community Member
3 years ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

#haiku BIRD CAPITALISM Hope it works better for them than it does for us.

John Longville
Community Member
3 years ago

This comment section doesn't permit the line breaks used in haiku. You have to insert them in your mind. One comes after "CAPITALISM"; another after "them".

Load More Replies...
Upcoming Trends
Community Member
3 years ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

Good day I am so grateful I found your blog, I really found you by accident, while I was browsing on Bing for something else, Anyways I am here now and would just like to say thanks a lot for a marvelous post and an all-round interesting blog (I also love the theme/design), I have bookmarked it and also added your RSS feeds. I really love the information you provided about the fast and furious here. Please do keep up the fantastic job. I hope you see my article about Netnaija or Nonprofit fundraising platforms! https://www.makeoverarena.com/nonprofit-fundraising-platforms/ https://www.tecreals.com/mobiletvshows/

Molly Cule
Community Member
3 years ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

I remember a Download festival where they rewarded a full bin bag of empty cans or plastic bottles (separated recyclables) with a full can of cold beer. There were a lot of people litter-picking that year.

ebbaoruhaikekeluhe
Community Member
3 years ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

magpies are basically cleaning up after humans. i think that this is a good idea since people just won't clean up after themselves.

Siddy Das
Community Member
4 years ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

This guy pulling a tom sawyer shows how far humanity has actually come.

Maria
Community Member
4 years ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

Do only bottlecaps work? Otherwise they're quickly going to learn to throw any old thing in there!

CatScratchFever
Community Member
4 years ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

Maybe started with one bird using the hole in the feeder to stash it's new found treasure, then out pops a treat, does it again and same thing happens, over time the bird and other birds will learn this is how to get food.

Load More Replies...
BoredDragon
Community Member
4 years ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

This is cool but...I don’t think it’s a good idea to have birds carry trash around. Like, I know that they’re smart and all, but they could choke. Anyways, this is really cool.

Debbie
Community Member
4 years ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

But why does he want to pick up fruit? It is a natural thing and benefits insects and birds too. (Ofcourse don't toss out fruit on purpose or in plain sight, but fruit is organic.)

Steve Cruz
Community Member
4 years ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

Watched all his videos and didn't figure out how the magpies deduced a botle cap in the receptacle would trip the snack dispenser.

Noel Bovae
Community Member
4 years ago DotsCreated by potrace 1.15, written by Peter Selinger 2001-2017

Poor bird HATES those freaking peanuts! You could see his/her disappointment every time a peanut came out. 🥺

Eel Music
Community Member
4 years ago

This comment is hidden. Click here to view.

BoredPanda keeps score on beliefs just like the Chinese communists. Quit being evil. My number is crazy-low, just because I believe in God and morality

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