Least Bittern Identification

The Four Keys to ID

  • Size & Shape

    Least Bitterns are very small herons. They have long legs and toes, daggerlike bills, and long necks that they often keep drawn in, giving a hunched appearance. Agitated birds may raise the crown and neck feathers.

    Relative Size

    Larger than a Red-winged Blackbird, smaller than a Green Heron.

    Relative Sizebetween robin and crowbetween robin and crow
    Measurements
    • Both Sexes
      • Length: 11.0-14.2 in (28-36 cm)
      • Weight: 1.6-3.4 oz (46-95 g)
      • Wingspan: 16.1-18.1 in (41-46 cm)