Identifying Dall’s Porpoises and Harbor porpoises can be difficult in the field. While you may not be able to see the color difference, look for the presence or absence of water spray. Because of their speed in the water, Dall’s Porpoises create a stream of water known as a rooster spray. Harbor Porpoises will not.
Head to Katie's blog post to learn more and take the quiz!
Her blog post also covers the 2016 Ways of Whales conference.