Danish photographer Morten Koldby doesn't take typical animal portraits. His ongoing series explores how animals' facial expressions often resemble those of humans. He's learned that their expressions run the gamut - while some animals look highly nervous, others seem surprisingly arrogant.

When asked what he hopes to accomplish with the series, Koldby simply stated, "I hope to make it possible for people to relate to these animals, and see the beauty in this part of nature."