Explore.org is a great site featuring live webcams of bison, bears, birds, whales, seals, elephants, kittens, and puppies. The webcams are all over the world. When the live feeds aren't working or aren't exciting, switch to Explore's YouTube channel for recorded videos. The Explore YouTube channel features edited "highlight" videos from the webcams.
Applications for Education
Explore.org offers a lesson plan section for teachers. Not all lesson plans are appropriate for all grades and the lesson plans are labeled accordingly. All of the lesson plans are based upon videos hosted by Explore.