The San Benedicto rock wren (Salpinctes obsoletus exsul) is a small extinct passerine which was endemic to San Benedicto Island in the Revillagigedo Islands off Mexico.

On August 1, 1952, lava fountains started to break out of the Boquerón vent, located in a rift between the two older volcano cones.

[1][2][3] Two weeks later, the entire island was covered in ash and pumice up to 10 ft (3 m) deep.

Bárcena crater, nearly 1100 ft high (over 300 m), rose where the wren's habitat had previously existed.

It was one of but two landbirds on San Benedicto, sharing the island with western ravens, which were wiped out by the eruption as well.