Today is Earth Day and for the special day the search industry has some special logos and themes. Google has an animated Doodle, Bing has a pretty home page, Baidu has a GIF logo, Yahoo even has a special logo.
You can see Google's logo above, it is an interactive video Doodle that you can play over here. It covers the Wandering Albatross, Coastal Redwood, Paedophryne Amauensis, Amazon Water Lily, Coelacanth, and Deep Cave Springtail.
Bing:
This image has been removed because of fear of being sued over copyright...
Yahoo:
Baidu:
Search Engine Roundtable:
Here is a video of the Google home page's Im Feeling Lucky button yesterday on Easter:
Forum discussion at Twitter.