Host plants:
I found the caterpillar on Galium aparine (La Gomera). It might prefer Galium, but feeds possibly also on other plants.
Habitat:
I found the caterpillar in La Gomera in moist places at the base of cliffs, along with those of Mythimna unipuncta (December 2011).
Life cycle:
The caterpillars hide during the day at the base of the herb layer. Pupation takes place in a cocoon in the soil. In warm areas, the moths fly over the whole year.
Remarks:
Orthonama obstipata is widespread in warm areas almost cosmopolitan and is also found in Southern Europe.