A proboscis monkey holding on to a tree with its right arm while holding a fruit in its left arm. Coloured etching by J. Pass after J. E. Ihle.

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A proboscis monkey holding on to a tree with its right arm while holding a fruit in its left arm. Coloured etching by J. Pass after J. E. Ihle. Wellcome Collection. Public Domain Mark. Source: Wellcome Collection.