Among the birds of the world, it is usually the males who have the brightest feathers and the females who are the most drab, ...

That could help alter the male-to-female ratio of baby turtles considerably. Allen, for one, finds the new developments reassuring. Sea turtles may be more resilient than once thought.

A trio of Peregrine Falcon chicks hatched on a cathedral roof have been revealed as all male during the ringing process.The ...