- Basileuterus ignotus
- Olive-green upperparts
- Yellowish underparts
- Greeny-yellow supercilium bordered by narrow black stripe above
- Rufous crown
- Dusky olive ear-coverts
Montane forests, generally over 1400m but seen as low as 1200 m.
Their main diet consists of insects and arthropods, gleaned at around 2-10 m above the ground.
Call: a penetrating tseeut.
- Clements, J. F., T. S. Schulenberg, M. J. Iliff, D. Roberson, T. A. Fredericks, B. L. Sullivan, and C. L. Wood. 2014. The eBird/Clements checklist of birds of the world: Version 6.9., with updates to August 2014. Downloaded from http://www.birds.cornell.edu/clementschecklist/download/
- Handbook of the Birds of the World Alive (retrieved December 2014)
- BirdForum Opus contributors. (2023) Pirre Warbler. In: BirdForum, the forum for wild birds and birding. Retrieved 9 December 2023 from https://www.birdforum.net/opus/Pirre_Warbler