JOURNAL ARTICLE

Comparative analysis of weight in male and female sihek (Todiramphus cinnamominus) chicks at Brookfield Zoo Chicago.

  • Published In: Avian Biology Research, 2025, v. 18, n. 2. P. 80 1 of 3

  • Database: Academic Search Ultimate 2 of 3

  • Authored By: Ramont, Margaret; Hickman, Cody; Snyder, Tim; Chinnadurai, Sathya K; Miller, Lance J 3 of 3

Abstract

This article focuses on sexual size dimorphism (SSD) in the sihek (Guam kingfisher, *Todiramphus cinnamominus*), an extinct-in-the-wild bird species from the family Alcedinidae. Using body mass data from 58 chicks hatched at Brookfield Zoo Chicago between 1989 and 2023, the study confirms moderate reverse SSD, with females weighing approximately 7% more than males at fledging and adulthood. Growth modeling from hatch to 40 days showed no significant difference in growth rates between sexes, suggesting SSD may develop primarily after fledging. These findings contribute to understanding SSD evolution in birds and provide valuable data for the conservation management of this species.

Additional Information

  • Source:Avian Biology Research. 2025/05, Vol. 18, Issue 2, p80
  • Document Type:Article
  • Subject Area:Science
  • Publication Date:2025
  • ISSN:1758-1559
  • DOI:10.1177/17581559251331754
  • Accession Number:184467337
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