Tres Marías Islands.
Usually considered conspecific with C. latirostris and C. doubledayi. Differs from C. latirostris in glittering turquoise-green vs sapphire-blue throat (3); greeny-bronze vs turquoise-blue breast (2); whitish-edged darkish grey (not pale grey-white) undertail-coverts (2); slightly shorter bill (effect size [but n=6] −3.55; score 2). Differs from C. doubledayi in dullish green vs glittering turquoise-blue crown (3); glittering turquoise-green vs sapphire-blue throat (3); greeny-bronze vs extensively royal-blue underparts (3); whitish-edged darkish grey (vs blue-black) undertail-coverts (ns); slightly longer bill (effect size 0.88; score 1). Monotypic.
Tres Marías Is, off W coast of Mexico.
Food and feeding
Status and conservation
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