It answered some of my questions - no non-living things, like pollution, etc. Check.
I kinda thought that would be the case, though I was hoping otherwise. OTOH, maybe that's a good idea, even for my Big Idea. There may be other places I can log this other data. Also, I discern from the list of species that they permit observations of things like protista, fungi, and other things. That's good news.
There was some mention of "duplicate observations" being undesirable. However, they are not clear what this means. It could mean, "Don't post the same set of pictures over and over." And if that's what it means (and I think that IS what it means), then I agree that it's useless - even a waste of resources and people's time. Also, it creates clutter to wade through if one is trying to study something, say multiple observations of a particular kind of snake.
OTOH, and I hope this is not what they mean (and I think it isn't what they mean), it could be that this refers to observations of the same thing. That would be disappointing, because one of the things I hope to do with my project is document the same thing over time as it matures and the seasons change and the environment is affected.
I'm going to assume what I consider the more reasonable interpretation unless someone tells me otherwise.
The Big Caveat. I do most of my Internet activities from my cell phone. Kinda hard to see what all is going on there. I just sat down to my desktop to review some things (like the TOS, etc) and discovered that creating a Project is not the recommended way of doing what I want to do. However, it doesn't say that one can't do it. I think I'll just sort of play it by ear.
The note under Managing Projects says:
"If your reason for wanting to start a project is simply to keep track of all observations recorded in a particular geographic area, you may find that using the filters on the Observations page is sufficient for your needs."
Moreover, as I look at their "reasons to create" a project, I see that none of my reasons apply - and that my reason for doing this (well sort of) is specifically addressed as an exclusion. Maybe as I get more familiar with the tools available, I'll delete the project (assuming that deleting the project will not delete the observations associated with it).
It is not my expectation that anyone else would contribute to the project, only that anyone who had an interest could do so easily.