Search Results for: Offal of birds
trade currency for them in the form of small metal rings passed into the hands of human researchers.
"they don't get them in their normal diet, so it's quite a good reward." but despite the nuts' value—or perhaps because of it—parrots are also willing to share their treats and the tokens to buy them with other birds. given the option, the birds will transfer the precious metal rings to a friend in a...
https://www.smithsonianmag.com/science-nature/parrots-share-currency-help-their-pals-purchase-food-180973917/