These two critters were seen having a tasty meal.  Their color and shape are intended to confuse their predators.  Notice the eye-like spots along the body, the sharp pointy tale, and even how they curve in their body to mimic a leaf.  Their feet have dark sticky pads that let them crawl over the stems and branches to get at the most tasty morsels, even hanging upside down as these two are.

Here’s a hint:  it’s a caterpillar, but for which butterfly or moth?

Answer found at this link.