Answer:
Well, in biology, a trait or character is a feature of an organism. The term phenotype is sometimes used as a synonym for trait in common use, but strictly speaking, does not really indicate the trait, but the state of that trait.
It'd have to be a<em> bat.</em>
Bat's are blind and use sonar or echolocation to "see" where they are going. Day and night makes no difference in their abilities.
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