A hummingbird with slow motion. The video slows down to just under a frame per second starting about 7 secs in and speeds back to the normal 29.97fps at the 29 sec mark. Given the motion blur for each of the frames, the bird's wings are beating faster than 29.97 times per second. According to Wikipedia, the beats per second varies from 12-80 depending on the species of humming bird.
A short clip of Chinese alligators in the reptile house of the Cincinnati Zoo. Some of the males were upset with another male. Their vocalization has a very unique sound. We heard it outside the building and went into see what was making the sound. Watch their throats. Filmed in August 2008.