Wow what a thread. If you thought it was a fallout server or walking dead server then you've got that one all wrong. No, most insects seem to be fine. No it's not a total wipe out. No not every field is dead. No we won't map change. No, this isn't the end of the campaign and yes, more posts are coming as a response to player interaction but I'm busy. Effectively this is a lot more for flavour to get the suggestion in RP, some people do rations, some people are harvesting earlier to preserve things, fishermen may have become very popular lately (on that note, sea life seems untouched, and there's plenty of variety there). We also had people go to the Frontier and begin farming areas for backup stores and those are untouched.
As a side note, some species went extinct because they were not played, and nothing happened to further try to use them when the 'endangered' tag came in, amongst other things. This won't be the case for the generic animals.
And also, the first post was in part meant to come off as a rumour, as if word from scattered scouts/hunters is that there's hardly anything left to find - This doesn't mean quite literally that there is zero population. Guess you'll just have to wait for the ending to see how things go beyond that. Hopefully that's a good enough summary there were 3 pages.