Chico's tyrannulet (Zimmerius chicomendesi) is a Near Threatened species of passerine bird in the family Tyrannidae, the tyrant flycatchers.

[2] Chico's tyrannulet was first described by the ornithologists Bret Whitney and colleagues in 2013 and given the binomial name Zimmerius chicomendesi.

They have a white iris, a brownish red maxilla, a reddish pink mandible, and blackish legs and feet.

It inhabits campina woodland and scrubland, a biome characterized by poor, often sandy or rocky, soils and generally low vegetation.

The most commonly heard is a call, "a distinctly double-noted 'tweep-tweep' (occasionally single- or triple-noted), with variants and different inflections".

Development of this road may also involve quarrying for sand within the campina habitat, and once complete it will make the area more accessible for logging and agriculture.

"[1] "Although part of the species’ range is already nominally protected within the newly gazetted Campos Amazônicos National Park and some of the rest lie within indigenous territories, further protected areas should be declared within the distribution of both species, free from disturbance by road-building and other associated settlement activities.