Rare resident, now confined to the islets of Champion-by-Floreana Island and Gardner-by-Floreana where rhe population is estimated to be around 150 birds. Range does not overlap with any other species of mockingbird. Little information is available on the species' breeding biology, although it is known to nest on Prickly Pear Opuntia cacti.
Similar to Galapagos Mockingbird but bill slightly longer and plumage shows extensive dark smudging on flanks and less streaked upper parts. Lacks the dark ear-coverts and white collar of the other mockingbird species. Iris red-brown.
Loud and melodious but variable.