One of the best features of Windows 7 personalization gallery is that it has been frequently updated with awesome themes for Windows 7. Microsoft has updated the gallery with two new themes- Butterflies and Insects (Dynamic theme). The butterflies theme as the name indicates is a pack of 13 high resolution wallpapers with close up shots of butterflies.
The insects theme is a dynamic theme which means it is updated with new wallpapers frequently through RSS feeds. This theme features elegant dragonflies, graceful butterflies, adorable lady bugs, and other insects and is dynamically updated.