Originally Posted by
Byron haugh
On the other hand, as they say, if you read the several books which research flies from below the surface and what the trout sees with his problem of living below a mirror, you will find that the most prominent thing a trout sees when a fly or insect is floating toward it are the wing points.
You are correct so far as what is seen in the window. What is seen first through the window is the highest point of the natural.
As you are aware, a fish actually sees the portion of the emerging insect such as the shuck before it can see any of the above film structures of the emerger. Even if the insect is a completely emerged dun on the film, it sees the depression of the film by the legs and abdomen of the adult. These "points of light" due to the depression of the film is visible well before the wings of a mayfly is seen in the window.
Here is an underwater photo of a dry fly and then an illustration. You can see the hackle points that have penetrated the film.
Regards,
Silver
"Discovery consists of seeing what everybody has seen and thinking what nobody has thought"..........Szent-Gyorgy