You say that the Sittidae extend to Madagascar, but there is no number in the tabular heading. From Wordnik.com. [More Letters of Charles Darwin — Volume 2] Reference
Nuthatches: Family: Sittidae. From Wordnik.com. [The Annotated "Eyes of the World"] Reference
Sittidae. From Wordnik.com. [Chin Hills-Arakan Yoma montane forests] Reference
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