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Ridgway's Rail

From Opus

Photo © by MarysanImperial Beach, California, USA, December 2004
Photo © by Marysan
Imperial Beach, California, USA, December 2004
Rallus obsoletus

Contents

[edit] Identification

A large rail with a long, slender and slightly decurved bill.

  • 35–40 cm (13¾-15¾ in) in length, male average 20% larger than female
  • Dark brown forehead to nape
  • Dark brown upperparts with dark brown centers of feathers
  • White chin and throat
  • Ochraceous buff underparts, rufous breast
  • Flanks with contrasting white bars with dusky or black bars

[edit] Distribution

Breeds from central California through Mexico.

[edit] Taxonomy

Formerly included in Clapper Rail.

[edit] Subspecies

Four subspecies recognized1:

  • R. o. obsoletus - Northern California (Humboldt Bay to Monterey Bay)
  • R. o. levipes - Southern California (Santa Barbara) to Baja California (Scammons Lagoon)
  • R. o. yumanensis - Salton Sea and Colorado River basin to western Mexico (Nayarit)
  • R. o. beldingi - Western Mexico (southern Baja from Magdalena Bay to Espírito Santo Island

[edit] Habitat

Grassy marches and mangroves.

[edit] Behaviour

[edit] Diet

These birds eat crustaceans, aquatic insects and small fish. They search for food while walking, sometimes probing with their long bills, in shallow water or mud.

This bird is rarely seen flying, which is reflected in the many subspecies found across its range. However, the north east populations in the US are migratory, wintering more southerly along the Atlantic coast.

[edit] References

  1. Clements, J. F., T. S. Schulenberg, M. J. Iliff, D. Roberson, T. A. Fredericks, B. L. Sullivan, and C. L. Wood. 2017. The eBird/Clements checklist of birds of the world: v2017, with updates to August 2017. Downloaded from http://www.birds.cornell.edu/clementschecklist/download/
  2. Gill, F and D Donsker (Eds). 2014. IOC World Bird Names (version 4.4). Available at http://www.worldbirdnames.org/.
  3. Birdforum thread discussing the taxonomy of Clapper Rail

[edit] External Links

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