No. Think fly.

does your brain process thought?

No. Think fly.

What might be useful to anyone interested in the matter is this :

The mind of the trout: a cognitive ecology for biologists and anglers - Thomas C. Grubb - Google Boeken

Read on, there's more that can be of use...

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Johan Janssens

Thanks for that Johan.

Be the fly

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ランカシャー·ラッズの

Colour exists only in the brain.
Feel free to check this:
www.ytyeflies.co.uk/colour.html

Tell that to plants who photosynthesise, who don't have a brain.

If there were no animals, only plants, leaves would still be green.

yeah, and the animals that were not there wouldn't see any colour so that proves it

If, as bigtroot asserts, red colours are the first to disappear as the daylight wanes how come reddish dries work so damn well in evening rises?

We're never going to know how or what a trout sees because not one of us is a trout. The day I'm using a fly of a given colour, say a coral booby, and a trout sticks his head out of the water and says to me, " you've got to be having a giraffe, mate, if you think I'm going to take that grey bit of old tat" then I'm going to think seriously about their ability to see colours. Until then, I think they can see pretty damn well and will proceed on that basis.

There is a big difference when talking about dries and wets.