Yup, The Audubon Society has Job and Internship Openings

The National Audubon Society, an environmental organization that is over a hundred years old and is one of the largest conservation groups in the USA, has lots of employment openings and usually some available internships which you can see via http://careers-audubon.icims.com  .  The National Audubon Society's home page is http://www.audubon.org/.