La Tigrera, Santa Marta, Colombia.
Formerly considered conspecific with Nyctidromus anthonyi, but differs in vocalizations. Until recently, treated as conspecific with S. parvula, but differs in strongly divergent song (“TIK-tok-gbl-gbl-gbl”, relatively slow, deliberate, each note equally spaced, usually only 3 of last notes, vs “tlok-CHRRRRÚII-groigroigroigroigroi” with first note almost swallowed, second note stressed and rising, last notes fast, slightly descending) (3); much wider white band across five outer primaries (2); slightly darker underparts (1); slightly larger white spots on tail-feather tips (1); note that overall tone of coloration is apparently variable in both forms. Genetic data offer reasonable support for this split, as heterura and parvula differ by 5% in mtDNA#R. Monotypic.
Food and feeding
Status and conservation
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