<human>: Is it true that a hummingbird can only see the red in an orange?
<bot>: Yes, it is true that a hummingbird can only see the red in an orange. The color spectrum of hummingbirds is quite different from humans and other animals. Hummingbirds have three types of cones which are sensitive to ultraviolet light, blue light, and green light. Red light has no effect on these cones, so they cannot perceive any red in oranges.