Here are some plugins for your WordPress blog.
Add a bug to your blog!
Bug Of The Day is a Wordpress plugin that creates a Bug widget which you can add to your sidebar. The widget displays the latest photo in Jenn Forman Orth's Bug Of The Day series. Most photos are from her back yard in Massachusetts, the creepiest back yard in America.
Begin your blog with a happy, happy flower!
Wildflowerizer is a Wordpress plugin that creates a Wildflower widget which you can add to your sidebar. The widget randomly displays a photo that's been recently added to the Wildflower Field Guide, North America group at Flickr.