Unknown on Silver Birch leaf (in leaf litter)

Unknown on Silver Birch leaf (in leaf litter)

Observation - Unknown on Silver Birch leaf (in leaf litter) - UK and Ireland. Description: Found in deciduous leaf litter on Silver Birch leaf, strands vary from 5mm to 15mm in length, some capsules have single strand whilst other longer ones have two, thought it may have been a gall of some description but possibly a fungi?

Found in deciduous leaf litter on Silver Birch leaf, strands vary from 5mm to 15mm in length, some capsules have single strand whilst other longer ones have two, thought it may have been a gall of some description but possibly a fungi?