THERE'S NO SUCH THING AS SPECIES:

A "dramatic" shift in behaviour and appearance obscured the identity of two birds on remote Indonesian islands.

The forest-dwelling birds are members of the pipit and wagtail families, but were not recognised as such, partly because they live in very different habitats to their relatives. [...]

DNA samples confirmed the their true identities, and it suggests that birds can change appearance in short periods of time.

"This is surprising because these birds do not look anything like a pipit or wagtail," explained co-author Per Alstrom from the Swedish Species Information Centre, based at the Swedish University of Agricultural Sciences.

He told BBC News that the birds also occurred in "completely different habitats".

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