Happy July 4th to those in the U.S.A.

Triads haven't been thoroughly studied?! I wonder why not?

http://www.livescience.com/55278-animal-sex-bald-eagles.html

Interestingly, a "marriage" between one male and one female bald eagle isn't the only possible arrangement. "We have numerous documented examples of triads," Watts said. "Those typically involve a male and two females."

These triads can produce large clutches with contributions from both females, and all three adults provide food for the brood, Watts said, adding that "those are interesting situations, but they haven't been thoroughly studied."