Bugs This category will be for all non-insect and non-spider bugs. It’s not super scientific, but will hopefully make sense. Brown Millipede Brown millipedes are beautiful small bugs common in dark damp places. Flat-Backed Millipede Flat-backed millipedes are important composters found commonly in gardens, compost piles, and rotting wood. Greenhouse Millipede Greenhouse millipedes are small common bugs that can be found in cool damp places, especially in and under old wood. Harvestman Also called daddy long legs, these are arachnids but not spiders. Woodlouse Woodlice are commonly found in rotting wood, which they eat.