Hosnie's Spring

Christmas Island blue crab (photo credit: Isarena Schneider)
Blue crab hideout, Christmas Island (photo credit: Isarena Schneider)
Stand comprising some of the largest mangrove trees ever recorded (photo credit: Max Orchard)

Hosnie's Spring

  • Country: 
  • Site number: 
  • Area: 
    202 ha
  • Designation date: 
  • Coordinates: 
    10°28'S 105°41'E
Materials presented on this website, particularly maps and territorial information, are as-is and as-available based on available data and do not imply the expression of any opinion whatsoever on the part of the Secretariat of the Ramsar Convention concerning the legal status of any country, territory, city or area, or of its authorities, or concerning the delimitation of its frontiers or boundaries.


An area of permanent, shallow freshwater wetland, fed by a natural spring system located approximately 30 metres above sea level and 120 metres inland of the seaward cliff. The wetland is covered by a stand of mangroves (Bruguiera gymnorhiza) estimated to be 120,000 years old. The Site includes surrounding terrestrial areas with rainforest grading to coastal scrub, and includes an area of shoreline and coral reef. It is significant for the age, location and size of the mangroves as well as for supporting large numbers of crabs including red crabs (Gecarcoidea natalis), robber crabs (Birgus latro) and blue crabs (Discoplax hirtipes). Access is limited by Parks Australia to small groups such as bird watchers or scientific teams to conserve the ecological character of the Site. The greatest threat comes from the formation of multi-queen “super colonies” of the invasive yellow crazy ant (Anoplolepis gracilipes), thought to have been introduced accidently to Christmas Island between 1915 and 1934.

Administrative region: 
Australian Territory of Christmas Island in the Indian Ocean.

  • National legal designation: 
    • National Park - Christmas Island National Park
  • Last publication date: 


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