We see them whenever we look up on a clear, moonless night.
Like I said, under the right viewing conditions. Orange County, Calif, has quite a bit of light pollution, so we have to travel a ways to get those viewing conditions.
For example, I was on a campout at a Boy Scout reservation in a canyon just north of Brea. In the middle of the night, I needed to take a short hike to the latrine (on campouts, I made it a habit to avoid using my flashlight as much as possible). It was a clear, moonless night and just the starlight was enough to illuminate the campsite such that I could see everything. Thinking back, though, it was very likely the light pollution from Brea and Fullerton spilling over the ridge that gave me my nightlight, but it was still a neat experience.
I grew up in central Orange County, so my first Boy Scout campout, which was in the high desert, was the first time I had a clear unpolluted view of the sky and I was overwhelmed with all the stars. When my older son was in Cub Scouts, we went on a family campout at Lost Valley, a Boy Scout campsite near Anza Borrega. I told him about my first experience and how neat it was. But when we got there and night fell, the moon was out keeping me from delivering on my promise, so he just rolled his eyes and said, "Yeah, right, Dad, whatever you say." Then in the middle of the night, he woke me up saying that he had to go to the latrine. As we walked across the gravel (the moon had set by then, BTW) I suddenly noticed that I could only hear my own footsteps. Looking back I saw my son standing there motionless looking up at the stars in awe of what he was seeing -- all he could manage to mumble was, "You were right, Dad."
A few years later I was the effective Webelos leader (couldn't be officially because of BSA's idjitotic practice of religious discrimination) and our Webelos den participated in a Lost Valley camp weekend for Cub Scouts. Looking forward to holding a stargazing session with the boys (and having studied up for it), I saw for the first night that the moon would was out. Taking note of when the moon rose, I applied my astrology training from decades before to perform some mental calculations, from which I estimated that each night the moon would rise about 45 minutes later. That meant that on our last night there we could have our stargazing session before the moon showed up to spoil it, which we did. During that stargazing, we also watched several satellites transiting across the sky.
ABE
As I recall, part of my reluctance to use my flashlight was to preserve my night vision and, I guess, to better take in nature and my surroundings, a bend I've always had.
At that last campout weekend I mention above, while walking through our camp area under ambient light, I noticed a point of light under a mesquite bush, so I investigated. Resorting to my flashlight for a couple seconds, I saw that that glow corresponded to one end of a larva, a small grub. An example of bioluminescence. Over the weekend, I spotted several more. On the way back from the final night's campfire ceremony and on the way to our stargazing session, I spotted one in an embankment next to the trail and pointed it out to our boys.
Edited by dwise1, : Tweaking the first part slightly.
Also an ABE