Google have celebrated the birthday of William John Swainson, an English ornithologist born on the 8th October 1789.
Swainson was an explorer, malacologist, conchologist, entomologist, and also an illustrator.
Accompanying the explorer Henry Koster to Brazil in 1816, he collected over 1,200 species of plants and 20,000 insects.
Incidentally the Google Doodle contains an illustration of a Hummingbird, the name of Google's recent algorithm update.
The illustration is adapted from Swainson's 1820 lithograph of a Hummingbird, displayed to the right (click to enlarge).
You can view the doodle on the Google homepage today in the UK.
The "Google Search turns 15" presentation from Larry Page and Sergey Brin's old rented garage office is shown below: