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Orioles are one of the most brilliantly colored songbirds in North America. Their orange and black, patterned after the heraldic colors of Lord Baltimore, are a familiar sight in shade trees throughout eastern North America. They are also renowned for their sock-like hanging nests, artfully woven of plant fibers. Nest building is a three-stage process and takes about a week, according to Cornell Lab. The female chooses a site in her mate’s territory and then anchors the distinctive nest to a fork in the slender upper