 Female Northern Mockingbirds lay a clutch of 3 to 5 eggs, which they incubate about 13 days, then feed and care for the nestlings about 11 days before fledging. These mockingbird nestlings are about 4 days old (photos by Paul Konrad).  Baltimore Orioles lay 4 or 5 eggs per clutch, incubate the eggs 12 to 14 days until they hatch, then feed and care for nestlings 12 to 14 more days before they leave the nest. Oriole fledglings continue to be fed and protected during the post-fledging period while they learn to fly and find food for themselves.  House Wrens are favorite backyard birds that nest in a natural cavity, woodpecker-excavated cavity, or a nest box provided by birders. For such a small bird, it
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