European Goldfinch 049 Madrona Marsh Southern California -
In a blink, the eye sends data to the brain. Is this a friend, a foe, something to eat, or something to ignore.... or something to play with?
So here's a fun tidbit. Some critters have oil droplets as part of their vision light filtration system.
"Bird eyes have a rich set of photoreceptor cells, consisting of rods, double cones and single cones, which endows birds with visual capacities far beyond that of humans. The four classes of cone photoreceptor cells (stay awake, OK?) mediate a tetrachromatic colour vision system covering a wide range of wavelengths, from the ultraviolet to the red. Each of the four participating cone photoreceptor classes has a different visual pigment, and in addition,
each contains a small
optical device,
the so-called oil droplet. "
ncbi.nlm.nih.gov
European Goldfinch 049 Madrona Marsh Southern California -
In a blink, the eye sends data to the brain. Is this a friend, a foe, something to eat, or something to ignore.... or something to play with?
So here's a fun tidbit. Some critters have oil droplets as part of their vision light filtration system.
"Bird eyes have a rich set of photoreceptor cells, consisting of rods, double cones and single cones, which endows birds with visual capacities far beyond that of humans. The four classes of cone photoreceptor cells (stay awake, OK?) mediate a tetrachromatic colour vision system covering a wide range of wavelengths, from the ultraviolet to the red. Each of the four participating cone photoreceptor classes has a different visual pigment, and in addition,
each contains a small
optical device,
the so-called oil droplet. "
ncbi.nlm.nih.gov