Hi lily pad, I am still navigating my way in this forum. I stumbled upon your site because I was desperately trying to find a way to repopulate the stream nearby ( ventura county, ca). For years every season we had a nightly tree frog concert. Wonderful. Then the waterway was drained due to sewer replacement and water reintroduced after it was filtered. No tree frog chorus after that. It's been 3 yrs and they haven't come back. F&G said they can't help. So what to do? I thought I might nurture some myself and repopulate the stream. Is this a reasonable quest? Can anyone advise me? Thanks.