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African Openbill - BirdForum Opus

Alternative names: African Open-bill, African Open-billed Stork

Anastomus lamelligerus

Identification

60cm. Black head, brown eye and bill, grey and black throat, black upperparts and long, black legs. Shiny wings.
Visible gap between mandibles

Distribution

Africa south of the Sahara as well as Madagascar
Western Africa: Senegambia, Senegal, Guinea, Mali, Sierra Leone, Liberia, Ivory Coast, Burkina Faso, Ghana, Togo, Benin, Nigeria, Niger, Chad, Cameroon, Central African Republic, Equatorial Guinea, Gabon, Congo, Angola
Eastern Africa: Sudan, Eritrea, Ethiopia, Somalia, Kenya, Uganda, Rwanda, Burundi, Tanzania, Zanzibar, Zambia, Mozambique, Malawi
Southern Africa: Namibia, Botswana, Zimbabwe, South Africa, KwaZulu-Natal, Swaziland
African Islands: Madagascar

Photo by Steve G
Sabaki River mouth, Malindi, coastal Kenya, August 2007

Taxonomy

Polytypic. Consists of two subspecies.[1]

  • A. l. lamelligerus:
  • A. l. madagascariensis:

Habitat

This bird is principally associated with extensive stretches of fresh water, although it is known to wander into drier regions. It is typically a bird of marshes, swamps and lakes where it feeds primarily on molluscs.

Behaviour

The bill is specialised for feeding on molluscs and bivalves. The lower mandible is used to slice through the muscle holding either the snail in its shell or the 2 halves of a bivalve shell. The upper mandible is used to steady the prey while the extraction is performed. The bird uses the sharp tip of its lower mandible to get past the protective plate which snails use to seal themselves into their shell.

References

  1. Clements, JF. 2008. The Clements Checklist of Birds of the World. 6th ed., with updates to December 2008. Ithaca: Cornell Univ. Press. ISBN 978-0801445019.
  2. Avibase

Recommended Citation

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