Tuesday, June 9, 2015
Animals can see other things than humans
Cats, dogs, birds, bees, fish, mice, reindeer, bats, hedgehogs, ferrets, and some reptiles can see ultraviolet light. If you imagine a rainbow, ultraviolet would be below the inner purple band. A human eye sees nothing there, it looks like the rainbow ends at purple, but many animals might see more.
This ability has developed because of different needs in different species. A bee may need ultraviolet vision to discern colors and patterns that lead it to nectar. Reindeer are believed to have developed ultraviolet vision to discern polar bears and other threats that blend in with the white snow.
So, why can't humans see ultraviolet light? Our eyes allow us to see in higher resolution than the animals, which in turn means that we can see details better. The downside is that we don't see well in low-light, and that we see a smaller spectrum than many animals.
~ Maria Sadowski ~