fly on eucalyptus tree

fly on eucalyptus tree

Observation - fly on eucalyptus tree - UK and Ireland. Description: Pair of these found on eucalyptus tree trunk in my garden. Thought it might have been a robber fly but there don't seem to be any piercing mouth parts.

Pair of these found on eucalyptus tree trunk in my garden. Thought it might have been a robber fly but there don't seem to be any piercing mouth parts.