Drop in migratory bird numbers: study

[Simon Hampel]

AM - Drop in migratory bird numbers: study

Like the frog, birds are considered an accurate barometer of the state of the environment.

Fewer migratory birds is a cause for concern.

A new study has found Australia's massive migratory bird population has plummeted over the last 25 years with up to 75 per cent disappearing.

It's the first major long-term survey assessing the shore birds from Broome to Sydney.

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