The arrival of bird flu in Africa exercises publications across the continent, with some carrying reassuring reports that their countries are on top of the situation while others cast doubt on their ...

South Africa is home to many species of weaver birds that are distinguished by relatively small differences in the size of their yellow and black markings, the colour of their eyes and so on.

By Emily Anthes Is the sky truly blue ... yellow. But to honeybees, it would be an eye-catching ultraviolet, depicted here as magenta. (The gland would also appear ultraviolet to many of the birds ...

Illuminated by blue and UV light, the birds’ white and bright yellow plumage broadcasts colors ... primarily because it’s not something that our own eyes perceive.” Though birds-of-paradise ...