Host plants:
The caterpillar lives on Lonicera species, especially Lonicera xylosteum.
Habitat:
Calliergis ramosa colonized undergrowth rich forests and adjoining hedge areas preferably in the (middle) mountain ranges.
Life cycle:
The pupa hibernates. The moths fly from May to late July. The caterpillar lives mainly from June to August or September and is well camouflaged on the branches.
Endangerment: regionally endangered or decreasing
Endangerment factors:
Undergrowth rich forests are increasingly rare. But in mountainous areas (Alps) the risk is still low.
Remarks:
Calliergis ramosa is distributed locally in Southern and Central Europe. Here it prefers the mountains. To the north, it reaches only Central France and the German Uplands. In Asia, only a few reliable records are known such as from northern Iran.