These stunning birds spend the winter in Mexico and migrate north during the spring to breed. As far as raising the babies is concerned, grosbeaks have an egalitarian relationship: the male and female share nesting duties. Here's a photo of the female.
Her plumage is much less flambuoyant than the male's. But (unlike most other species) she does sing! You can hear several variation of the Black-headed Grosbeak song at http://www.allaboutbirds.org/guide/Black-headed_Grosbeak/sounds
These birds are one of the few species of bird that eat Monarch butterflies while wintering in Mexico. Most birds cannot tolerate the toxins in the butterfly.