Water Boatman

Water Boatman

Observation - Water Boatman - UK and Ireland. Description: I don't know what Boatman this is and thought that it might be carrying an egg sack. Looking on the web I can find nothing like this as eggs or parasite, can you help ?

I don't know what Boatman this is and thought that it might be carrying an egg sack. Looking on the web I can find nothing like this as eggs or parasite, can you help ?