They are beautiful .What part of the country are you in? I am in N.E. would love to know what I can do to attract them to my yard any suggestions?

i live in southwest Colorado and get mostly evening grosbeaks and black headed grosbeaks and once in awhile a pine grosbeak. Back where you are you should get the rose breasted and the pine and the evening grosbeaks. here they come to the feeders starting in late april and nest nearby and stay till fall when they migrate south.
they all love nuts and most seeds and fruit and berrys and mine love hulled sunflower seeds and boss and also the eat from a fruit tray with chunks of diced fruit and drink from the necter feeders. they hang around the same areas here as the orioles and tanagers and often see them feeding at the same feeders. i get bags of peanuts or spanish peanuts from a farm and ranch store and they can chomp down and break up bigger pieces of cracked corn because of their heavy beaks. but they also drink orange juice and eat the grape jelly often sharing with the orioles. and drink from the hummingbird or oriole necter feeders.

I live in northwest NJ and have had a rose-breasted grosbeak at my safflower feeder for the last 3 days.... Not spotting any females, only one male. He is gorgeous, wish he would find a mate & stick around!

BTW, I put up the safflower feeder for the cardinals and to thwart the blackbirds; seeing the grosbeak enjoy it as well is icing on the cake!