Larus delawarensis - Ring-billed gull:

Summary Information
Living OrganismsAnimalia / Craniata / Aves / Ciconiiformes / Laridae / Larus / Species

This section is currently predominantly used in Wildpro to link different data types and demonstrate inter-relationships. Although it identifies that taxonomic interrelationships of species (see "header") it does not currently contain detailed information on the bird species itself. As WILDPro is developed, we will gradually convert these pages into full Species pages.

The taxonomy of birds is still under review and the A World Checklist of Birds by Burt L. Monroe, Jr and Charles G. Sibley (B89) has been chosen as the primary reference. The taxonomic structure will be amended when new editions or complete references are identified by the scientific world as the recognized primary references for taxonomy.

Alternative Names
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Distribution Western, central, north eastern North America; Winters to southern Mexico (B89)
Habitat Breeding - Rocky islets or isolated coasts, occasionally marshes (B193)
Further Information Feeding:
  • food - omnivorous
  • feeding behaviour - mainly ground gleans, sometimes high dives and surface dips


  • location and structure - saucer nest on ground
  • nest building - male and female
  • breeding structure - monogamous (polygynous)


  • markings - patterned
  • number of eggs - 2-4 (1-7)
  • broods - 1 brood
  • incubation - male and female; 21 days


  • development - Semiprecocial; Mobile, remains at nest, fed
  • parental caring for young - by male and female
  • fledging - ? days


Published Guidelines linked in Wildpro
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