Yesterday I saw a house finch flitting around my bird feeder. It’s bright red head & chest stood out among all the other sparrows at my feeder, with their feathers of brown & gray. House finches don’t come to my yard a lot, probably because it isn’t their preferred habitat, but I see them now & then. The female house finch looks much the same but lacks the red. The house finch has many different warbling calls & songs, click on the link to hear them: http://www.allaboutbirds.org/guide/House_Finch/sounds. It has some neat info about house finches too. House finches look quite a bit like the purple finch & red crossbill, but have less red & a straight beak. They are widespread & pretty common in most parts of the U. S., & if you set out sunflower seed (their favorite food) & water, they may come to your yard bringing a flock of as many as 50 other house finches with them.