THere are a bunch of different mites. Some are larget than others. I think the leg ones are nearly aor are microscopic. Wash their legs well with soap and water and then dry them and coat them well with vaseline. The next day the skin should be lots more pliable. Repeat the procedure again. I had some birds that I obtained with some really bad looking legs and withing a week they were looking pretty good! THey seem a lot more comfortable now also! Good luck! Terri O