Photographer Joel Sartore has been shooting nature for 20 years—long enough to amass a great collection of images you can check out at the New York Times.
“The whole point of this project is to really be able to look these creatures in the eye and get to know them,” he said. The animals are beautiful in their variation, their proximity yielding expressions most humans would interpret in emotional terms — anger, humor, pride.
For instance, I interpret this photo as a frog that has just won the Publisher's Clearinghouse.
Ironically, that's probably not actually an expression of happiness. In the Times article, Sartore says the species is known for its vicious reaction to potential predators.
Thanks, Tim Heffernan!