Can mammals see in color?
Most mammals can, but not all. Humans are mammals.
Good Question think it's because of the predator prey relationships. Like rabbits are colorblind, because they only eat grass and occasional bugs. Cats need color to see the birds and mice and others to distinguish their food source. Like the coral snakes. An animal that is prey to it has color to see their predator.
Chickens see in the infra red range and therefore see very well under good light conditions. They do not see well in the dark which is why they go to roost in the early evening. The color receptor organization in a chicken's retina far exceeds that which is seen in most other animal retinas including most mammals.
That depends on exactly how you define the term. Humans are trichromats: our eyes contain color receptors that are sensitive to three different spectral bands. In "color blind" people, there's something wrong with one or more of these types of color receptors. Most mammals are thought to have only two types of color receptors. This doesn't make them completely insensitive to color, but it does give them a type of color blindness. Sea mammals appear…