Owl deterrent for a rabbit colony

We just finished our outside, open colony and they're living it up! However, I can't help but notice more and more hoots both day and night. It's been 2 weeks and no sight of owls, but we know that will not be the case forever. We have mini disco balls painted with polycrylic hanging from the roof to deter hawks and besides the huge mound of clay in which they're creating their tunnel systems, we have plenty of cubbies for them to hide in. We also have a 3 level electric fence around. Owls pose a different threat at night. The only solution we have thought of thus far is putting a bird net from the roof down to prevent any owls from getting in to snag a bunny. What have you tried and how did it work?

Here's our opening night

You'll also likely want to be on the lookout for hawks & eagles. Motion sensing solar lights might help. You don't say what the dimensions of the colony are - some tree nets might help - or you could end up with birds trapped in the netting...

Shiny, metalic streamers strung across(party style), tube kites, old CDs...

I saw elsewhere, in permies, a thread where they were talking about those air-dancing tubes - but that would require power, on top of your electric wire.