All of these are by Stephen Oachs.  Check out his website, he's got some incredible stuff.

Rocket to the moon by Vilhjálmur Ingi Vilhjálmsson

fair weather friends by Ed Karjala Photography

Swanosaurus Rex by Mr. Bones

Thunderhead by Steve Coleman

Balluminaria by David Williams

TRINITY by Martin Gommel

Explanation: Thunderstorms almost spoiled this view of the spectacular June 15 total lunar eclipse. Instead, storm clouds parted for 10 minutes during the total eclipse phase and lightning bolts contributed to the dramatic sky. Captured with a 30 second exposure the scene also inspired what, in the 16 year history of Astronomy Picture of the Day, the editor considers may be the best title yet for a picture (title credit to Chris K.). Of course, the lightning reference clearly makes sense, and the shadow play of the dark lunar eclipse was widely viewed across planet Earth in Europe, Africa, Asia, and Australia. The picture itself, however, was shot from the Greek island of Ikaria at Pezi. That area is known as "the planet of the goats" because of the rough terrain and strange looking rocks.

http://apod.nasa.gov/apod/ap110618.html

Found here - http://www.cgsociety.org/

By Christian Skauge

By Bence Máté

By Clark Little

(I've got one of this guy's books, totally stunning work)

By Richard Rothstein

By Jon Cornforth

By Cristina Mittermeier

By Bence Máté

By Peter Lik

By Ben Hall

By Russ Shugart

By Amy Marques

All of today's photos are from here - http://www.mnh.si.edu/exhibits/natures-best-2010/photographs.html  If you have time, its totally worth poking around and looking at past years' photos too.  There is also a lot more detailed info about each picture, location, type of animal, and technical camera info.