Human vs Animal vision ...

[Dr Klaus Schmitt]

This is vision of HUMAN, BUTTERFLY, BEE, DOG, HORSE and BAT.

1. Humans have trichromatic vision, they see Blue, Green, Red,
2. Butterflies see UV (ultraviolet), Blue, Green, Red they are Tetrachromats
3. Bees see UV, Blue, Green, they are trichomats
4. Dogs are Dichromats, see only blue and yellow, but also can see some UV
5. Horses are Dichromats, they only see blue and yellow
6. Bats do not see color, but some are sensitive to UV also

 

[nicolas claris]

Hi Klaus
Vey instructive!
I'd love to know how the scientists could determine these specificities?

 

[Jerome Marot]

I'd love to know how the scientists could determine these specificities?

The usual, I suppose. You paint a symbol in one of the wavelengths you want to test the sensitivity to and see if the animal finds the food which is hidden behind it. Presumably, one can also directly analyse the structures in the eyes to find out how many different receptors there are.

 

[Peter Dexter]

And interesting the vision of Owl Monkeys, different from other primates.

 

[Dr Klaus Schmitt]

Thanks! Scientists do different tests: analysis of the receptors in the eyes of a species and their response to different wavelengths, transmission analysis of the cornea and lens of eyes, behavioural analysis of reactions to different presented wavelengths etc. Leads to pretty clear idea how the individual visions work. Just recently it has been found out that dogs do have UV vision.

 

[nicolas claris]

Thank you Jerome Marot and Dr Klaus Schmitt i

 

[nicolas claris]

View attachment 1373

This is vision of HUMAN, BUTTERFLY, BEE, DOG, HORSE and BAT.

1. Humans have trichromatic vision, they see Blue, Green, Red,
2. Butterflies see UV (ultraviolet), Blue, Green, Red they are Tetrachromats
3. Bees see UV, Blue, Green, they are trichomats
4. Dogs are Dichromats, see only blue and yellow, but also can see some UV
5. Horses are Dichromats, they only see blue and yellow
6. Bats do not see color, but some are sensitive to UV also

Personaly I do prefer the human vision, go figure!
But it is interesting to see how the structure is differently rendered…

 

[Asher Kelman]

​

I too prefer the human vision, but otherwise the Butterfly must be happiest!

I wonder whether they see different wavelength as static or perhaps the different wavelength could be perceived as pulses of activity like the bright cross hatches on modern AF cameras to say one is in focus!

Asher

 

[Dr Klaus Schmitt]

soo funny to see that humans seem to always see things so one-sided from their egocentric perspective.
All animals I guess at least should be equally happy, as nature has given them their senses and they never
seem to lack anything ... only we humans do