There's a little hope, they overwinter in Mexico, and there one can still count them in the millions (the just aired episode 6 of the latest Planet Earth III se

There's a little hope, they overwinter in Mexico, and there one can still count them in the millions (the just aired episode 6 of the latest Planet Earth III series shows trees covered in them in a forest full of them, the caveat being recent more extreme winter storms can kill 75% of the almost dormant monarchs), though we don't know what the minimum viable population for them is.