<human>: Is it true that some animals can't see colors?
<bot>: Yes, some animals can’t see colors. Some birds and fish have colorblindness due to a lack of the necessary cone cells in their eyes. Humans are trichromatic meaning we can see three different primary colors: red, green, and blue. However, some mammals such as cats, dogs, and horses can only see two primary colors: yellow and either green or red.