Spiders also attack you when riding in a vehicle.[edit source]
They don't seem to do damage but can knock you off your path. (only seen when riding in bumblebee)
Rules of Engagement[edit source]
Update 3 dramatically changed the rules of engagement.
For example, the note on using power poles no longer works.
There is a detailed [Dev update on creature spawning] that clearly describes the goals.
A very nice description was included in the Update 3 release to Early Access notes:
"We also did changes to the creature respawn system. They now respawn within 2-3 in game days if no powered factory building is nearby and they won’t despawn until you have killed them once. Those changes mean that all creatures killed in a pre-update 3 save will return once, even in factories. Any creature that has been removed once should not respawn again in powered factories. There are some edge cases of creatures stuck within Foundations that pop out of them at later times, so you might have to clean house a few times before they are all gone for good."