Mourning Warbler Identification

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The Four Keys to ID

  • Size & Shape

    A small but sturdy songbird with a fairly full body and thick neck. The bill is thin and straight, smaller than the bill of the similar-looking Connecticut Warbler. It has a moderately long tail and strong legs.

    Relative Size

    Larger than a Carolina Chickadee, smaller than a Tufted Titmouse.

    Relative Sizesparrow or smallersparrow-sized or smaller
    Measurements
    • Both Sexes
      • Length: 3.9-5.9 in (10-15 cm)
      • Weight: 0.4-0.5 oz (11-13 g)
      • Wingspan: 7.1 in (18 cm)

Regional Differences

Adult males in Newfoundland show especially blackish lores compared to mainland, especially western birds.