One of my favorite places to visit in Aruba is a small but very productive butterfly farm between Eagle Beach and Palm Beach. If you go it will cost you $13 US but the ticket is good for the length of your stay. I went on two separate days. The butterflies are the most active in the morning and less active in the evening. As for equipment used I try to keep things simple. All the shots were hand-held (no tripod) at anywhere between 400 - 1250 ISO and the lens was a 50-200mm F4 Pentax zoom on a K10D body. Noise was cleaned up in Photoshop w/minor brightness & contrast corrections as needed. If you want to know the names you can go here:
They have a nice photo gallery with the names. Without a doubt the one that impressed me the most was the Atlas.
Thanks for all the questions - really!