Parrots can judge the relative value of food, holding out for tasty walnut slivers.
Published: September 11, 2018 at 02:00AM
from #NYT Science Read the full article here: https://ift.tt/2wZS0Gq
Parrots can judge the relative value of food, holding out for tasty walnut slivers.
Published: September 11, 2018 at 02:00AM
from #NYT Science Read the full article here: https://ift.tt/2wZS0Gq