Appearance
The imago stage measures 5 to 7 millimetres and ranges in color from sandy ochre to pale brown.''Phimodera humeralis'' is found in sparsely vegetated dune terrain on heaths and sandy hills, living on and especially in the sand around ''Carex arenaria'', a 10–40 cm-high grass. ''P. humeralis'' is difficult to see, as from a distance they look like small light gray stones.
Adult ''P. humeralis'' hibernate through winter and mate in the spring. The mating takes about 10–15 minutes.
The nymphs are 2.5 to 4 millimetres and are usually found on the ''C. arenaria'' grass plants during June and July.
''P. humeralis'' is considered an endangered species, especially in northern Europe.
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