Prevalence and implications of sex reversal in free-living birds

The ability to unequivocally identify the sex and reproductive status of individuals is crucial across many fields of study. Recent evidence indicates that avian sex determination is more flexible than once believed, with sex-reversed individuals identified in domestic bird populations—that is, individuals exhibiting gonadal and morphological traits of one sex while possessing the chromosomal makeup of the opposite sex. The presence of these individuals can challenge the reliability of traditional sexing methods that rely solely on external morphology, internal anatomy, or genetic markers. These methods, when used in isolation, fail to identify sex-reversed or intersex individuals, potentially overlooking their impact on population dynamics. In this pioneering study, we investigated the prevalence of sex-reversed individuals in five common free-living avian species in Queensland, Australia. By comparing internal and external morphological characteristics with PCR results from sex-linked..., , , # Data from: Prevalence and implications of sex reversal in free-living birds

Raw data used in Hall et al 2025 - Prevalence and implications of sex reversal in free-living birds

[https://doi.org/10.5061/dryad.9w0vt4bs0](https://doi.org/10.5061/dryad.9w0vt4bs0)

**Description**

This dataset contains one Excel file (with multiple sheets), one PDF, and a collection of individual image files representing photographs of birds and gel results.

*Excel file - \"Raw_Data_All_Species__Hall_et_al_Dryad_.xlsx\"*

This Excel file contains 5 separate sheets, one for each species used in the study (Australian magpie, crested pigeon, laughing kookaburra, rainbow lorikeet, and scaly-breasted lorikeet). Each sheet consists of the same columns of data, with one individual bird per row. The columns are as follows:

* Sample: Unique identifier for each individual sampled.
* Source: Institution or organization where the sample originated (e.g., wildlife hospital, research project).
* Source Acc#: Accession...,