Family Wrens (Troglodytidae)

Near Threatened

Socorro Wren (Troglodytes sissonii)


French: Troglodyte de Socorro German: Socorrozaunkönig Spanish: Chochín de Socorro

Thryothorus sissonii


, 1868,

Socorro Island, in Revillagigedo Group, off west Mexico


Although traditionally placed in genus Thryomanes (where even suggested to be conspecific with Thryomanes bewickii), and sometimes in Thryothorus, recent molecular work supports its placement in present genus, close to T. aedon#R. Species name insularis commonly used prior to 1951, when sissonii was shown to have priority; proposal for treatment of latter as a nomen oblitum has generally been ignored, and since 1951 sissonii has been used almost universally. Monotypic.


Socorro I, in Revillagigedo Archipelago, off W Mexico.

Descriptive notes

11–12 cm. Has buffy lores, pale buff supercilium, ear-coverts mottled grey-buff; crown grey-brown with some darker feather centres, shoulders and back grey-brown with... read more


Song usually starts with 2 or more gruff “chuk” notes, breaks into short, rich, slightly scratchy... read more


Woodland and brushy hillsides.

Food and feeding

No data available on food items taken. Forages low down in vegetation and also on the ground, turning over leaves; also climbs on tree... read more


Apparently breeds early, though no precise data available; families with fledged young in Apr. One nest was located in knothole of decayed... read more



Status and conservation

Not globally threatened. Currently considered Near Threatened. Restricted-range species: present in Socorro Island EBA. Quite common; stated to be the second most abundant... read more

Recommended citation

Kroodsma, D. & Brewer, D. (2018). Socorro Wren (Troglodytes sissonii). In: del Hoyo, J., Elliott, A., Sargatal, J., Christie, D.A. & de Juana, E. (eds.). Handbook of the Birds of the World Alive. Lynx Edicions, Barcelona. (retrieved from on 18 October 2018).