10/15/2026
First recorded in Bolivia's Beni savannas in 1960, the bird now known as the Beni Greenlet (Hylophilus moxensis) was long considered a regional variant of two known Brazilian species. Genetic analysis, morphological study, and careful examination of its vocalizations eventually confirmed it as a distinct endemic species, restricted to the seasonally inundated savannas of the Llanos de Moxos. The Beni Greenlet is endemic to Bolivia.
The species was formally described and published on January 1, 2026 in the journal Avian Systematics by van Els, Montenegro-Avila, and colleagues, with the South American Classification Committee of Louisiana State University's Museum of Natural Science subsequently endorsing the English name Beni Greenlet in recognition of its restricted range in Bolivia's Beni Department. It is separated from its nearest relatives by approximately 1,200 miles.
eBird currently tracks observations of the taxon provisionally or under a descriptive placeholder (such as Gray-eyed Greenlet (Beni) / Hylophilus amaurocephalus [undescribed Beni form]) pending the annual Clements/eBird taxonomy update cycle.
VENT tour leader Andy Whittaker and his group encountered this newly described species on our recently completed Grand Bolivia Part 1 tour — the first VENT group to observe the Beni Greenlet as a recognized species in the field.
To read the full paper visit: researchgate.net/publication/399285182
For the SACC proposal visit: museum.lsu.edu/~Remsen/SACCprop1072.htm
Photo credit: Andrew Whittaker
📍 Bolivia