Parrots can judge the relative value of food, holding out for tasty walnut slivers.
The New York Times
By JAMES GORMAN from NYT Science https://ift.tt/2wZS0Gq
September 10, 2018 at 02:00PM
Parrots can judge the relative value of food, holding out for tasty walnut slivers.
The New York Times
By JAMES GORMAN from NYT Science https://ift.tt/2wZS0Gq
September 10, 2018 at 02:00PM
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