
The most acute vision in the world is often credited to eagles, as in the saying "eagle eyes." Today, Carmen and I witnessed the male Bald Eagle staring at a horse fly just off the front of his beak, distracted for a second or two. Raptors have as a many as five times more visual cells (
cones, versus
rods which are those for night vision) packed into their retina which is where the picture is formed on the back of the eye. We know that these birds can see detail at great distances, but how are they at viewing objects close up? Obviously just fine with this look of curiosity at the bug. Many owls have a slightly different perspective and poor vision up close (Great Horned, for example). Just be glad we can see the text messages on our cell phones! Well, for those that know how to do that texting thing...