The yellow-rumped warbler is usually the first of its clan to appear in the northern US and Canada from its wintering grounds in southern North America, arriving in the boreal forests where it nests in April and May. The "myrtle' form that occurs in the east has a white throat. The 'Audubon' form having a yellow throat prevails west of the Rockies. The pictured 'myrtle' warblers are both males, the upper one an early April arriver sitting on a broken cattail stalk and the lower one in a forsythia bush a bit later in the spring. photos taken in Middleton, Wisconsin.
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