My favorite species of arachnid is the Curlyhair tarantula. I like them for what makes each insect unique. For example, fireflies have cold light - they don't give off heat. Ants wasps and bees, all primitive, live in a structured colony or society. Almost like humans.
Butterflies have interesting patterns made up of scales.
Insects are neat. I like butterflies, moths, beetles, but especially the weird looking insects that live all around us but are very good at hiding. The insects that make sounds can hear with an organ like a membrane that can pick up vibrations. Insects hear by organs called tympanum. Tympanum are membranes that can detect vibrations caused by sound.