[PhasmaFelis]

Yes, obviously habitat destruction, chemical exposure, etc. are bad. But the sudden, broad emergence of a new set of symptoms means that something new is happening besides business as usual.

In this scenario, saying "habitat destruction" and leaving it at that is like a coroner saying "cause of death: stopped being alive." It's true, but not useful.

[tidydata]

No, this is absolutely business as usual. The “new” thing you’re talking about is a “new” thing during that year, until something new comes out the next, repeating to produce this: https://www.birds.cornell.edu/home/bring-birds-back/

What was that saying about missing the forest for the trees?