Optic Flow

cardinal

At lunch today, I enjoyed warm sun, a nice breeze and fresh air; an elixir guaranteed to induce tranquility and on occasion deeper than normal thought.

The chair I was lounging in was positioned so that I could look across the creek to a more densely wooded area.  Although there is a small clearing, the foliage is pretty dense, so I have never seen much except a few birds and a lone raccoon foraging for food.  Birdsong is plentiful from that direction though and today with me having just scared all the black birds away from my cardinal feeder and scattering over there, it was exceptionally loud.

There are always multiple bird species around, but today I noticed something I had never paid attention to before.  I was watching a particular bird fly from somewhere behind me into the wooded area and I noticed that he flew into the foliage and managed to dodge branches without even slowing down.  Having just watched the raccoon pick its way along the branches and move along carefully, the difference was made all the more obvious.

So, once again, I sat amazed at the wonders of our Creator.  I googled it later and found out that birds do this by a trick of the eye called optic flow.  Optic flow is the way our eyes perceive motion as we travel thru a landscape.  It is the illusion that trees and buildings are passing us by; the greater the optic flow the more quickly things seem to be moving.  Below is a short pbs.org video, in case you are interested in knowing more.

Optic Flow Video

As I sat and thought about this, it reminded me how the bird fully trusts his Creator; he forges on ahead using the talent God gave him.  And as God cares for this little bird, He cares for me.  He sees every obstacle ahead and prepares me to meet them head on.  I just have to do my part and trust Him every step of the way.

Matthew 6:25-27 “That is why I tell you not to worry about everyday life—whether you have enough food and drink, or enough clothes to wear. Isn’t life more than food, and your body more than clothing? Look at the birds. They don’t plant or harvest or store food in barns, for your heavenly Father feeds them. And aren’t you far more valuable to him than they are? Can all your worries add a single moment to your life?

Comments

  1. I can relate to your start…
    At lunch today, I enjoyed the warm sun, a nice breeze, and fresh air; an elixir guaranteed to induce tranquility and on occasion deeper than normal thought.

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