A while ago, I posted about whether a monkey could be an author and thus own a copyright. The District Court held that under the U.S. Copyright Act authorship does not extend to animals (see Order). That case is still trudging along because on July 28, 2016, PETA filed an appeal to the Court of Appeals for the Ninth Circuit (link to Appeal brief, link to Answering brief).
I just saw an article on Yahoo where an attorney in New York was arguing that two chimpanzees should be treated as a legal persons, such that habeas corpus, would apply to them so they could be taken from their current homes and placed in a wildlife refuge.
Image is licensed under the CCO v1.0 license.