Just... everywhere.
That noise outside? You bet your arse it's a fox.
That feeling at the back of your neck? A garden spider has definitely set up camp.
Yeah...it's autumn.
Presumably this isn't your first autumn.
There are lots of spiders because it's spider season. There are always loads of spiders in September and October.
And you're noticing all the foxes because this is their mating season, and they make a horrendous amount of noise when they're mating.
You'll be panicking about all the leaves on the trees dying and falling off, next.