Four ships of the Royal Navy have borne the name HMS Cockchafer after the insect, the cockchafer:
, of five guns, was formerly the United States schooner Spencer, that the Royal Navy captured and employed as a ship's tender. She captured two American armed brigs, one in a single-ship action. The Royal Navy sold her in 1815. was an wooden screw gunboat launched in 1855 and sold in 1872. was a composite screw gunboat launched in 1881 and sold in 1905. was an gunboat launched in 1915, hulked in 1947 and sold in 1949.
See also was an 8-gun lugger hired in 1794 that foundered in 1801.
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