Knowing more...
Thanks for the interest and the great questions!
• No clue about the type of spider, but he was not very colorful himself. I was looking for various flora subjects around the house, and there he was... right there posing for me. Not very camera shy, fortunately.
Color versus black and white... I tend to do a mixture of color, black and white, infrared and duotones. I like the variety, and have to admit I find it enjoyable to work with the same photo in different ways. Sometimes it's obvious which direction to go, and other times I'm surprised my my final decision.
In this case, the spider was not colorful, so going black and white didn't hurt the view of him. While the background was a nice shade of green, I like the look and feel of the leaf in the darker shade. For me, the black and white version also lends a little more mystery to the shot.
• Intent; that's always a tough question! I didn't take the shot thinking "black and white." Saying "art" sounds a little egotistical for me to say, but I think (hope) that it creates a sense of interest in the viewer. I guess that's art!
Thanks again for asking.
Andy