Aphids?

[malteseproverb]

I've been seeing these bugs starting a couple of months ago but only on blooms. They appeared in midwinter so I was initially skeptical that aphids would somehow get inside and survive for months only to appear on blooms, but I can't figure out what else they would be. No ants in sight. Now I'm seeing them on ferns and moss growing in my stanhopea. They're very tiny and grey, but now I'm seeing some white ones as well (pictured). I've been washing them off which has worked for some plants and the leaves of my orchids appear untouched. Could they be something other than aphids?