Sexual dimorphism in ruminants

7 August 2026 | Work in Progress

By Antoni V Milewski and Anthony J Mills · Originally published 30 June 2026

About this edition. This is Antoni Milewski’s post, republished with his permission. Only the photographs he chose are used. Those on iNaturalist under a Creative Commons licence are shown; the rest are hosted externally and are given as links. No images have been substituted. Read the original on iNaturalist.

Damaliscus lunatus lunatus

Damaliscus lunatus lunatus, Pixley ka Seme, ZA-NC, ZA, by peters5001
Peter SmallPixley ka Seme, ZA-NC, ZA · 11 Sep 2025CC BY-NCobs. 316694564

Damaliscus korrigum jimela

Also cited on iNaturalistobs. 143509509

Damaliscus lunatus jimela, Mara, Kenya, by simben
simbenMara, Kenya · 1 Aug 2010CC BY-NC-NDobs. 147820587

The following shows the modest degree of sexual dimorphism in body size in the topi:

Citedgettyimages.co.uk

Alcelaphus caama

CitedAdobe Stock

Posted on June 30, 2026 03:58 AM by
milewski

Addenda from the thread of comments

The author added the following in comments beneath the original post.

Both female

CitedDreamstime

Credits. Photographs reproduced from iNaturalist are shown under the Creative Commons licence stated in each caption and remain the copyright of the observers named. All other images cited by the author are hosted externally and are linked, not reproduced.

By Antoni V Milewski and Anthony J Mills. Text by Antoni V Milewski, posted on iNaturalist 30 June 2026 and republished here with permission. Read the original.