[1] The cryptic warbler was first identified as a new species in November 1992, when an unknown passerine was photographed, tape recorded and collected from Maromizaha Forest, Eastern Madagascar.

[3] The cryptic warbler is a small passerine with an olive-green back and grayish yellow underside.

[2][4] On average, adults measure 11 centimetres (4.3 in) from bill tip to the end of the tail,[4] and weigh 8.4 grams (0.30 oz).

[2] Although found in many habitats, the cryptic warbler prefers evergreen, humid rain forest between 900–2,100 metres (3,000–6,900 ft) elevation.

[1] It can be found in the canopy and sub-canopy of trees and shrubs between 2–25 metres (7–82 ft) off the ground, with a diet consisting of insects.