I had to choose between the last two. I took the more cautious 2nd to last option. I suspect the numbers are fine, and maybe growing, but without habitat, nothing does well very long ... including us.
I'm finding more evidence more often. I can't be sure what the cause it, it could be I'm homing in on better locations, it could be that I'm becoming more aware of what to pay attention to .. a skill that should be expected to improve with practice.
MIB