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The most important book about European birds in this century

10,000 Birds

Still, to be more realistic, there were 120,000 volunteer fieldworkers from all countries in Europe to collect data on 596 breeding bird species from across 48 countries and 11 million square kilometres in a systematic and standardised manner – one of the biggest citizen science projects on biodiversity ever.

Europe 264
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Birds of Bolivia: Field Guide–A Book Review

10,000 Birds

This is more than eBird reports–a checklist generated from the citizen science database lists only 1,413 species. The guide covers 1,433 species, the number of birds documented at the end of 2014, the cutoff point for the book. Clearly, this is an under-birded country. .

Bolivia 171