I am afraid the spider doesn't really stand out from the background enough for me. The rim lighting on the underside of the spider is nice though. Perhaps you could of altered your position to shoot the spider against a lighter background instead of the black on black you have here.
Hate spiders, love this picture... a very good capture of this distracting creature.. nice colors and DOF, beautiful how you captured the detail of the veb.. well done :o)
The reds and yellows of the legs is terrific - great DOF. After viewing this, I looked up the true definition of silhouette and in fact realized this is a fitting example. I thought it had to be completely black, but an outline works just as well. Thanks for teaching me something. 8