Do they see extra colors? See details.
The electromagnetic radiation spectrum is huge compared to the portion of it that humans see as visible light. Some animals, birds and insect have eyes designed to see down into the infra-red and some up into the ultra-violet. Do you think when they look at a rainbow, they see the same colors we see, just distributed differently? Or do they see the same ROY G. BIV we see plus some extra colors for their expanded range? What might those extra colors look like?