I swear I saw it with cigarette buts.
Comment on This Hi-Tech Bird Feeder Lets Clever Magpies Exchange Bottle Caps for Food
veroxii@aussie.zone 6 months ago
Can’t find it now but I recall a documentary where they did exactly the same thing but trained the birds to bring real money coins.
Somehow they got coins from somewhere to pay for food.
HubertManne@kbin.social 6 months ago
Zoop@beehaw.org 6 months ago
I remember seeing that, too.
DigitalDruid@lemmy.sdf.org 6 months ago
veroxii@aussie.zone 6 months ago
That’s it. It was a ted talk. Thanks!