HMS Epervier was an 18-gun Cruizer-class brig-sloop of the Royal Navy, built by Ross at Rochester, England, and launched on 2 December 1812.

Almost a month later, on 3 November, Epervier and Fantome captured Peggy of 91 tons (bm), W. O. Fuller, master, which was sailing from George's River to Boston with a cargo of timber and wood.

[3] (The British 38-gun frigate Junon, under the command of Captain Clotworthy Upton, was in sight about 10 nautical miles (19 km; 12 mi) to leeward.

There he notified his uncle, Admiral Sir John Borlase Warren, the commanding officer of the station, that he didn't trust his crew.

Epervier, under Master Commandant John Downes, sailed to join the Mediterranean Squadron under Commodore Stephen Decatur, Jr., whose mission was to stop the harassment of American shipping by the Dey of Algiers.

Epervier joined with Guerriere, Constellation, and Ontario in the Battle off Cape Gata on 17 June 1815, which led to the capture of the 44 (or 46)-gun frigate Meshuda (or Mashuda).

Two days later Epervier and three of the smaller vessels of the squadron captured the Algerine brig of war Estedio, of twenty-two guns and 180 men, at the Battle off Cape Palos.