One way to tell who is who is to look at the eagles' heads. The adult female has grayish feathers in front of and behind her eyes. The male has a stark white head, said Bob Anderson, director of the Raptor Resource Project, the organization that is running the webcam.
The other way to tell them apart is to size them up. The female is about 20 percent larger then the male. She also has a head with a longer shape, Anderson told OurAmazingPlanet.
This eagle couple has been together since the winter of 2007-2008. They successfully hatched and fledged two eaglets in 2008, three in 2009 and three more in 2010.