San Carlos, Río Negro, Venezuela.
Part of a complex that includes N. sulphureiventer, N. pallescens, N. aurifrons and N. chrysolophum. Differs from N. aurifrons in characters given under those species, from N. sulphureiventer by its stronger flame-tinged coronal patch (1); stronger yellow belly (1); slightly smaller size in bill and wing, more notably in tail (effect size for males –3.55, score 2); and nasal, twangy jewee-jewEE-JEWEE-Jewee-jewee vs nasal wraanh-wraanh (4)#R; from N. pallescens by its stronger flame-tinged coronal patch (1); stronger yellow belly (2); smaller size in bill, wing and particularly tail (effect size for males –6.49, score 3); and nasal, twangy jewee-jewEE-JEWEE-Jewee-jewee vs soft low nasal wraah wra-wra (4)#R; and from N. chrysolophum by its paler throat (1); brighter yellow belly (1); slightly darker crown sides (1); longer wing (small sample for chrysolophum but allow 2); shorter tail (small sample but allow 2); nasal, twangy jewee-jewEE-JEWEE-Jewee-jewee vs chip, chip, dree-zee-zee, zew (3)#R. Monotypic.
Extreme E Colombia (Vaupés), S Venezuela, the Guianas and N Brazil (mainly R Negro drainage and extreme N Amapá); also NE Peru (SW of Iquitos).
Food and feeding
Status and conservation
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