Cardinals are very common birds at bird feeders. Cardinals are territorial and very aggressive. Territories are defended all year long. The typical Cardinal nest contains 3 to 4 pale green eggs with red-brown spots. The nest is a cup of mixed leaves, twigs, and plant fibers, usually concealed in a thicket of branches or twigs.
Cardinals are very common around our house in suburban Maryland.
For several years we had a resident male whose chief pleasure seemed to be attacking the glass door between the deck and the dining room. We thought at first he was attacking his reflection, but the attacks would continue even when he couldn't possibly see a reflection. All rights reserved.