Long-billed Gnatwren Ramphocaenus melanurus
Version: 2.0 — Published July 16, 2020
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Long-billed Gnatwren is very widespread. It occurs from southern Mexico (north to Chiapas on the Pacific slope, and southern Veracruz on the Atlantic slope) south through Central America to eastern Panama. It seems to be almost absent from the Pacific slope of Colombia, but is present again in western Ecuador, and also occurs in adjacent northwestern Peru in Tumbes. It occurs across northern Colombia and throughout the Cauca and Magdalena valleys. It is very widespread throughout northern South America east of the Andes, including on Trinidad, from Colombia south to extreme northwestern Bolivia and east across Brazil to Maranhão. It is largely absent, however, from most of Bolivia and southwestern Amazonian Brazil, where it is replaced by its sister species, Chattering Gnatwren (Ramphocaenus sticturus); these two species are locally syntopic in Peru, and perhaps in Brazil as well. There also is a disjunct population of Long-billed Gnatwren in eastern Brazil, from Rio Grande do Norte south to Santa Catarina.
Historical Changes to the Distribution