Major Robert Ernest Cheesman CBE (1878 – 1962) was an English military officer, explorer, and ornithologist.

Cheesman was Private Secretary to Sir Percy Cox during his tenure as High Commissioner in Iraq.

In 1923, during a journey into the Arabian Peninsula, Cheesman collected over 300 specimens from the Hasa oasis, several of them previously unknown to science. These specimens are currently in the British Museum.

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