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- Medium-sized waterbird.
- Black back and face.
- White neck and underside.
- Long neck.
- Long, thin bill.
Immature DescriptionSimilar to adult.
- Both Sexes
- Length: 21.6-29.5 in (55-75 cm)
- Weight: 28.2-63.5 oz (800-1800 g)
- Wingspan: 31.1-33.9 in (79-86 cm)