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Jeepers Creepers (22)
Art_R
![Gold Star Critiquer/Silver Workshop Editor/Gold Note Writer [C: 200 W: 16 N: 483]](http://i1.treknature.com/misc/g-s-g.gif) (1995) | Jeepers, creepers, where'd ya get those peepers,
jeepers, creepers, where'd ya get those eyes?
from the 1938 popular music song by Harry Warren and Johnny Mercer...
hi folks , thought just one last photo of this dragonfly :-) I know I have posted a few of it but ....
thought that since last upload I said a bit on the little simple eyes that I would say a bit about its big peeper's :-)
actually I am going to try to stay away from really scientific stuff , no cut and past wiki's ... maybe borrow a few words from there though ;-)
going to post an image compilation to the workshop to sort of illustrate.
have you ever noticed that the large compound eyes of the dragonfly always some how seem to be looking at you ? by that I mean the appearance of the black spot or what may be mistakenly taken as a pupil ? well of course a compound eye has no pupil ... have a peak at the image in the workshop , it illustrates that the black area of the dragonflies eyes always appears in relation to you.
the compound eye is multifaceted , I guess one way to think of it is like a series of tubes that radiate out from a central location ,each tube receives light from a slightly different angle , when we look at a dragonflies eye the area that is black is the area that we are looking directly into these tubes , or the area of its eye that is seeing us.
its eye's see color and shapes but in lower resolution than us , it specializes in movement and direction.
in this image I am at a very low point of view , from a higher point the eyes black area would grow larger , the area is in a spot above the dragonfly , and is an optimal location for its vision , reason it sees best up is that dragonflies attack their prey from below. you can tell in this image that if I moved upwards a bit a large area of the eyes would darken , when the dark area is largest is the spot that the insect sees best.
though the eye specializes in motion , it can also be confounded , I managed to get within 12 inches of its eye just by moving slowly enough. it see's fast motion much easier than slow.
it is kind of incomprehensible to imagine just 'how' an insect see's its world , I have come to think of it in terms that they see mostly shadow/light , indistinct shapes , and most of there response to visual input is based on the type of motion they see.
I am of course no scientist :-) so it is really just the way I see it :-)
hope you like the pic , thanks for stopping in
regards
Art |
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