Silk 'tent' on hornbeam leaf

Silk 'tent' on hornbeam leaf

Observation - Silk 'tent' on hornbeam leaf. Description: I found this tiny, ovoid, flat-topped patch of silk on the vein on the upperside of a hornbeam leaf. The silk weave could be seen under a microscope. Inside there were several invertebrates like tiny woodlice in a row along the vein. I wondered if they

I found this tiny, ovoid, flat-topped patch of silk on the vein on the upperside of a hornbeam leaf. The silk weave could be seen under a microscope. Inside there were several invertebrates like tiny woodlice in a row along the vein. I wondered if they were scale insects. It was the only one I could find