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Island dwarfism in a tropical Australian python (Simalia amethistina)

Alastair Freeman, Ian Bell, Daniel J. D. Natusch*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

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Abstract

Dwarfism in insular populations of snakes has been documented at several localities around the world and it has been largely attributed to a phenotypic response of these isolated populations to food availability and composition. The incidental collection of size data for the Milman Island population of Simalia amethistina in north Queensland has brought to light a previously unknown example of island dwarfism in a tropical python species in Australia. Simalia amethistina on Milman Island are significantly smaller than conspecifics from the nearby mainland, with the maximum recorded size being only as large as the smallest 50% of mainland specimens. We attribute this dwarfism to the lack of large-bodied prey species available on Milman Island.

Original languageEnglish
Article numberZO25030
Pages (from-to)1-4
Number of pages4
JournalAustralian Journal of Zoology
Volume73
Issue number5
Early online date22 Aug 2025
DOIs
Publication statusPublished - Oct 2025

Bibliographical note

Copyright the Author(s) 2025. Version archived for private and non-commercial use with the permission of the author/s and according to publisher conditions. For further rights please contact the publisher.

Keywords

  • Cape York
  • food availability
  • insular
  • Lockerbie Scrub
  • Milman Island
  • prey composition
  • Simalia kinghorni
  • snake

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