Trochetia boutoniana shows off dark red nectar against a blue background and Trochetia blackburniana produces yellow nectar, which it shows off at the center of a yellow flower.

Why bumblebees prefer yellow flowers to red, and why it matters for biodiversity. Your friend's email. Your email. I would like to subscribe to Science X Newsletter. Learn more. Your name.

Q: Why are more fruits and flowers red, orange or yellow than blue? —Robert L. Morrison | Poughkeepsie, New York There is actually no true blue pigment in nature. A pigment creates color by ...

Yellow roses in Germany can hint at adultery. In the US, they simply mean ‘I miss you’. Adam Jacot de Boinod has a lot more. In this week’s Capital Letters.

A wolf licks a red hot poker flower in Ethiopia. This is the first known large carnivore to consume nectar. (Image credit: Adrien Lesaffre) However, it's not yet clear whether the wolves are ...