Three-toed Skink Gives Birth To Live Young And Lays Eggs

April 7, 2019

Australian researcher Dr. Camilla Whittington of the University of Sydney and her colleagues observed the normally live-bearing three-toed skink (Saiphos equalis) lay three eggs, and then several weeks later gave birth to a live baby lizard. The lizard, which is a “bimodally reproductive” species that can lay eggs or give live birth, is the first known vertebrate to perform both in a single litter.

three-toed skink


A three-toed skink in Australia was observed laying eggs and then later giving birth to a live young.

"It is a very unusual discovery," Dr. Camilla Whittington, of the School of Life and Environmental Sciences and Sydney School of Veterinary Science at the University of Sydney said in a news release put out by the university. 

"We were studying the genetics of these skinks when we noticed one of the live-bearing females lay three eggs," Dr. Whittington said. "Several weeks later she gave birth to another baby. Seeing that baby was a very exciting moment!"

Whittington said that the single litter (two mode pregnancy) makes the species an ideal model for understanding pregnancy. 

"It makes Australia one of the best places in the world to study the evolution of live birth, because we can watch evolution in action," Whittington said.

"Put in the context of evolutionary biology, being able to switch between laying eggs and giving live birth could allow animals to hedge their bets according to environmental conditions," Dr. Whittington said.

Related Articles

Former Wild Recon Host Donald Schultz Accused Of Illegally Selling Endangered Lizards

Ex Animal Planet host charged with selling Iranian desert monitors to undercover USFWS agents

Zoo Atlanta's Komodo Dragon, Slasher Dies At 20

Reptile was euthanized due to age-related complications.

Komodo Dragon Attacks Park Employees At Komodo National Park

Employees both bitten in leg by Varanus komodoensis.

Add your comment:
Edit ModuleShow Tags
Edit ModuleShow Tags Edit ModuleShow Tags
Edit Module

Cast Your Vote

Are you staying home as much as possible?


Edit ModuleShow Tags Edit ModuleEdit Module

Find Us On facebook

Edit ModuleShow Tags