Vireos are small stocky birds that generally feed on berries and insects. As opposed to warblers that move almost constantly, most vireos will perch and sit for a few minutes before hopping off to the next branch.
The Northern Bobwhite is the only native resident quail in Maryland. They are a stocky, short bird that prefers to run on the ground. During the winter they form coveys that can include as many as 20 individuals. The males make a distinctive bob-WHITE call during the summer.
Shrikes are unique songbirds in that they hunt small vertebrates including mammals, birds, and reptiles. They frequently will hang their prey on thorns for later consumption. They are usually found in open fields, hedgerows, and wood edges.
Generally small and drab birds, sparrows can be secretive and difficult to identify. They usually feed in seeds in the winter and insects in the summer. Most sparrows (especially Towhees) will scratch and kick on the ground to find food.