Zebra finches perceive only red
or orange, even when the truth falls somewhere in between
Date: August 1, 2018
Source: Duke University
Summary:
For a reddish-beaked bird called
the zebra finch, sexiness is color-coded. Males have beaks that range from
light orange to dark red. But to females, a male's colored bill may simply be
hot, or not, findings suggest. Due to a phenomenon called categorical perception,
zebra finches partition the range of hues from red to orange into two discrete
categories, much like humans do, researchers report.
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