Install the Free Eastern Butterfly Screensaver.
No nag screens or time limits!

Install the Eastern Butterfly Deluxe Screensaver
This is a shareware program and it will display 24 images for 21 days. Once registered, the screensaver displays all 150 hi resolution butterfly and skipper images. Includes the option of displaying the species names or turning the names off. Also images have 30 different adjustable transition effects

System Requirements: Windows 95/98/ME/NT/2000/XP


Registration costs only $11.95

Also you can try out these other screensavers

Eastern Damselflies Screensaver

Eastern Dragonflies Screensaver