
Millipedes & Centipedes
Millipedes are commonly found moving slowly through soils. They break organic matter like leaf litter, helping keep your soils healthy. Having a few of these invertebrates around is beneficial although in enough large numbers they can damage the area.
Centipedes have likely given you a scare at night. They are nocturnal carnivores that inject their venom into their prey. On the menu for these creatures are spiders, silverfish and flies.
https://www.nwf.org/Educational-Resources/Wildlife-Guide/Invertebrates/Millipedes
https://www.pestworld.org/news-hub/pest-articles/interesting-facts-about-centipedes/

Top photo: Centipede from Max Richard
Bottom photo: Millipede from NPS / Gracie Housman