Does anyone know who the culprit is here? By the middle/end of summer our
hostas leaves are all holey and eaten, looks like bugs (not animals) but we
don't know what is doing it or how to treat it.

They've just come in nice and full so if there is something preventative to
do I'd like to find out. I'd prefer something natural over chemical.

We're in Long Island, NY - I think that's zone 6? (not positive - I'm a
total newbie in the garden!)