From the website of the publisher:
The report is drawn from material developed for State of the World's Birds, a broader report which is available for download and as an extensive searchable database click to visit www.birdlife.org/sowb for further information and examples.
Critically Endangered Birds is a product of the BirdLife Preventing Extinctions Programme. It presents the science underpinning the programme and the actions needed by other organisations, agencies and governments to complement it.

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