This morning the New York Times published my op-ed about nature and same-sex marriage.
Please follow the link above to read the article. What follows is an abbreviated list of links to documents that are relevant to the piece.
Pope Benedict’s Christmas greetings to the Roman Curia
Elms: The whole genus Ulmus, to which elms belong, is bisexual (e.g., page 369 in Flora of North America, Volume 3. 1997. Edited by the Flora of North America Editorial Committee. Oxford University Press).
Ginkgo: Peter Crane’s 2013 book, Ginkgo, Yale Univ Press discusses both the separation of male and female (page 53) and “spontaneous partial sexual switches” (pages 63-64).
Data on the frequency of homosexual bonds and sex in birds: MacFarlane.