Masked Booby Identification

Adult Description

  • Large waterbird.
  • White with black tail and black along back of wings.
  • Long, pointed, yellowish bill.
  • Long pointed tail.
  • Long pointed wings.
  • Dark face mask.

Immature Description

Juvenile has dark head, back, and wings, with a white collar, a white rump, and a clean white underside.
Relative Size

Relative Sizegoose or largergoose-sized or larger
Measurements
  • Both Sexes
    • Length: 29.1-33.9 in (74-86 cm)
    • Weight: 45.9-82.9 oz (1300-2350 g)
    • Wingspan: 63.0 in (160 cm)