Usage History of 'avifauna'

The following chart shows how frequently 'avifauna' appeared in printed materials over time. For example, the word 'avifauna' occurred 8 times in books in 1862 and 2,228 times in 2008. From 1862 to 2008, the word 'avifauna' was used a total of 107,041 times in books scanned by Google. See Reference: Google Ngram project.

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