One thing I was surprised to learn is that ladybugs migrate like butterflies.
In California, there are secret locations in the Sierras where they overwinter before flying off into the central valley.
https://youtu.be/Y3v8AogAK7U?t=295
Some people even put them into their garden to kill bugs. The article said they love aphids.
[1]https://www.alamy.com/stock-photo-ladybird-ladybug-nest-on-w...