Wilson's Warbler

The Wilson's Warbler is usually seen at the Garden only during migration (April-May), but it can sometimes make a surprise appearance at any time. It's very small, with a long tail, which it often raises and flips about. The black cap on the adult male is distinctive, whiile both male and female have bright yellow undersides and plain yellow-olive upperparts.It's usually found in trees such as willows near water.