This morning, I was taking Boomer for a walk, and I spied this caterpillar on a low planter wall. A quick scan of the immediate area revealed some little shrubs with several more of them. I had never seen this kind of caterpillar before, so after I finished my walk with Boomie, I looked in my book and on the internet, and I have tentatively identified it as a Genista Moth caterpillar.
Then, of course, I went back with my camera to take pictures of them!
Genista moth caterpillar
Two caterpillars on their host plant