If you have a warm spot for cold-blooded creatures, then you might appreciate the Snakes Screensaver. It puts on a slide show of 32 high-quality photos of various types of snakes, many of them close-up shots. The versatile screen-saver engine lets you set any of the pictures as your wallpaper, plus provides options for transition effects, sizing, and image delay.
All images in resolution 800*600 and High Color (24-bit). A nice music background.
The screensaver also comes with 2 possibilities is Screen Saver Control and Wallpaper Control. Free screensaver download are on my site.