The Chemistry behind Color-Changing Birds (IMAGE) American Chemical Society Caption There are thousands of species of birds here on Earth and with those great numbers come great biodiversity! Birds are among the most colorful animals on the planet, due to the variety of forms of pigmentation in birds produced in bird's bodies and dieting taken from food sources. This week on Reactions, we'll explore the wide range of chemical and physical tricks used to make birds stand out, disappear -- or even fluoresce in a bright red under UV light: https://youtu.be/L_H1NC5sN50. Credit The American Chemical Society Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.