Family New World Warblers (Parulidae)

Near Threatened

Socorro Parula (Setophaga graysoni)


French: Paruline de Socorro German: Socorrowaldsänger Spanish: Parula de Socorro

Compsothlypis graysoni


, 1887,

Socorro Island, northwestern Mexico


Recently argued to be a separate species from S. pitiayumi in study that found it is genetically (though not morphologically) closer to S. americana#R. Differs from latter in its lack of pale chestnut on breast (2); yellow vs white belly (3); reduced white markings in both wing and tail (2); much less contrast in upperparts and on face (although some individuals retain dark on lores and around eyes; ns[2]); and notably longer tail (mean of 6 males 46·3 vs 40 mm in 10 americana; allow 2). Differs from S. pitiayumi, including geographically and morphologically closest race insularis, by its more extensive but duller yellow on underparts (1); duller, olive-tinged upperparts, producing much less contrast between grey nape and olive-green back (1); greatly reduced white spotting on tail (2); slightly longer bill and tail (mean in tails of 4 male pulchra 40·3 mm and of 4 male insularis 42·5 mm; allow 1); and evidently more complex voice, involving several songs, resembling those of S. ruticilla, S. pensylvanica and S. americana#R (allow 2); but more research needed. Monotypic.

What do (1) and (2) mean? Learn more about the scoring system.

Socorro I and Revillagigedo Is, off W Mexico.

Descriptive notes

11 cm; 6–7 g (two males, four females, five unsexed). Like S. pitiayumi, male has bluish-grey head and upperparts, a bronze-olive patch on mantle and... read more


Male gives multiple song types, the components consisting of buzzes, chips and trills. Commonest is... read more


Occurs in various habitat types, including lava rocks, beach vegetation, brushy hillsides and fig... read more

Food and feeding

Few data. Feeds primarily by gleaning in foliage of shrubs (e.g. Dodonea) and trees (e.g. Bumelia, Ficus and... read more


No information. Presumably builds a domed nest similar to that of S. pitiayumi.



Status and conservation

Not globally threatened. Presently considered Near Threatened. Restricted-range species: confined to Socorro Island EBA. No information on global population size or... read more

Recommended citation

del Hoyo, J., Collar, N. & Marks, J.S. (2020). Socorro Parula (Setophaga graysoni). 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 17 January 2020).