Acorn Woodpecker Identification

The Four Keys to ID

  • Size & Shape

    Acorn Woodpeckers are medium-sized woodpeckers with straight, spike-like bills and stiff, wedge-shaped tails used for support as the birds cling to tree trunks.

    Relative Size

    Smaller than a Northern Flicker; larger than a Downy Woodpecker.

    Relative Sizerobin sizedrobin-sized
    Measurements
    • Both Sexes
      • Length: 7.5-9.1 in (19-23 cm)
      • Weight: 2.3-3.2 oz (65-90 g)
      • Wingspan: 13.8-16.9 in (35-43 cm)