Brandon Hill plus 023

Brandon Hill plus 023

Observation - Brandon Hill plus 023 - UK and Ireland. Description: What insect could have made this? Its a round hill with a brown teat at the top. See also the open one... possible culprit is seen in a separate picture

What insect could have made this? Its a round "hill" with a brown "teat" at the top. See also the open one... possible culprit is seen in a separate picture