Now scientists have described a group of continental, rather than island, bird species that seem to be in the process of forming new species.

WSJ: Matt Ridley on the Possible Formation of a Species | Mind & Matter

Colour patterns on the wings of the butterflies may be crucial in forming new species, because they serve as mating cues.

BBC: NEWS | Science/Nature | Two species become one in the lab

Biologists have long dreamed of catching a new species in the act of forming.

WSJ: Matt Ridley on the Possible Formation of a Species | Mind & Matter