We know the backyard birds that usually nest in our birdhouses: House Wrens, Chickadees, Bluebirds, and House Finches. But what about our other backyard birds, like the Cardinal, Blue Jay, Goldfinch, Robins, Hummingbirds or Orioles? Where do they nest?   Cardinal nests are usually very well hidden in dense shrubs or trees, about 3-10 feet above the ground. The cup-shaped…