Why Do Some Lizards Shoot Blood from Their Eyes When Terrified?

The Strangest Defense Weapon in the Reptile World

In the animal world, defense mechanisms against predators take many forms. Some animals rely on camouflage, while others secrete foul odors. However, certain species of lizards have evolved one of the strangest defense tricks of all: they shoot foul blood straight from their eyes when facing real danger and extreme terror.

How Does This Terrifying Mechanism Work?

When lizards sense an imminent threat, such as an approaching predator like a bird or a snake, and find no escape, rapid physiological changes occur inside their bodies. These changes increase blood pressure in the head region, causing tiny blood vessels surrounding their eyes to rupture. The blood then squirts forcefully like a small fountain into the face of the stunned attacker.

Foul Odor and Bitter Taste

This trick does not stop at merely surprising the predator with blood; this blood is often loaded with chemicals that have a foul odor and a very bitter taste for predatory animals. This disturbing combination often prompts the attacker to leave the prey alone, allowing the small lizard to withdraw in safety after experiencing this terrifying ordeal.

A Lesson in the Survival of Living Organisms

This unique phenomenon shows the complexity of survival strategies in nature and how living organisms have developed unconventional tools to defend themselves. Although shooting blood may seem energetically costly for the lizard, it remains a small price to pay to survive the jaws of death in moments of extreme terror.

By: Hany Sallam

Source: popsci.com

Published by Hany Sallam

Hany Sallam, Founder and Editor-in-Chief of Scientific Magazine Ahram
An independent Arabic science magazine operating since 2008, dedicated to simplifying science, technology, space, natural phenomena and scientific stories for Arabic readers. The magazine includes sections such as “Zodiac Group” and “Stories and Tales”, alongside science topics that combine knowledge with a spirit of discovery. It operates independently and is not affiliated with Al-Ahram Press Foundation or any governmental body.