Barklice or Tree Cattle in the genus Cerastipsocus, and most likely Cerastipsocus venosus, are harmless, benign insects that feed upon lichens. Tree cattle, Cerastipsocus venosus (Psocoptera: Psocidae) are large barklice and get their common name from their habit of forming large colonies that move about in unison (much like a herd of cattle) ...
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