I quite often get asked for information about insects that look like sticks but aren't stick insects. I rarely get asked about protozoans.
I recently got an e-mail asking for help controlling Diardia in somebody's water supply. Of course they don't actually have stick insects in their water supply (see The Myth of Semi-Aquatic Phasmids), but instead have the protozoan parasite Giardia.
Names are important, correct names more so!