Western Giant Swallowtail

Small caterpillar - early instar, less than 1/4 inch long, brown and yellow in color. The face is black with a yellow, upside down "Y" shape. When I first saw it on the leaf, it looked like bird scat, not moving and was so small. Of course, I took a pic anyway and was surprised to see this!
This is the first instar of this cat.