Olivaceous a. : Resembling the olive; of the color of the olive; olive-green.

Example:


Taxonomy
Olivaceous Woodcreeper, Birds, we-we, species, Sittasomus griseicapillus, free encyclopedia, genus, flocks, Serra de Paranapiacaba, Portuguese, wu-wu, prey, Mello, Beisiegel, Machado, Alvarenga, Brazil, southern Mexico.

Defination from the web:
Olivaceous Woodcreeper (Sittasomus griseicapillus) is a passerine bird which breeds from southern Mexico through tropical Central and South ... The Olivaceous Woodcreeper is a common and widespread bird of forests and other woodlands. The Olivaceous Woodcreeper feeds on insects and spiders. ...