We noticed a lone coyote hurrying away, way down the path ahead of us. There were just a few of us on the path, but there was also a dog. The coyote obviously saw us as threats so it hurried up to a lookout, where, half-hidden, it proceeded to warn us off with its bark for about 20 minutes. A couple of people hung around to watch, as did their dog: they had never heard a coyote barking and were very excited and exhilarated by the experience.
I always suggest to people that it’s best to move on if you have a dog: this is the reason the coyote was barking. Having said that, I’ve noticed that coyotes will continue barking for a considerable time, whether the threat has departed or not! I took this video at the site of on den way back in April. Other people saw the pups, but I did not. On the video, you’ll hear lots of birds, a human voice and a San Franciscan fog horn in addition to the coyote’s barking!