Hummingbirds notice the color red easily amidst the endless green of the Amazon Rainforest. Flowers that rely on hummingbird pollination opportunistically use shades of red to attract the birds.
This image is from Wild Amazon.
Sea Life Park Hawaii, Oahu, Hawaii, United States: A bottle-nosed dolphin swims in the blue depths of its aquarium. This image is from Nat Geo Amazing!