Awesome Animal - Long-beaked Echidna - Stan C. Smith
One‐Sided Ejaculation of Echidna Sperm Bundles | The American Naturalist: Vol 170, No 6
What Animal Has a 4-Headed Penis and Produces Puggles? - Light To Light Transfers
Four-headed echidna penises under the microscope for Queensland captive breeding program - ABC News
Solving the mystery of the four-headed echidna penis
The Tasmanian Echidna's Four-Headed Penis - Democratic Underground
A Baby Echidna. Did you know Echidna's have a four headed penis and no nipples? (More info in the comments) : r/ecology
Kamikaze sperm and four-headed penises – the hidden ways animals win the mating game
Male Echidnas have a four-headed penis?! - YouTube
Colin Christian on Twitter: "Echidnas are Monotremes,one of two mammals that lay eggs. They also have a four headed penis. Look at that smile! https://t.co/pLAweboNN3" / Twitter
Solving the mystery of the four-headed echidna penis | Pursuit by The University of Melbourne
Solving the mystery of the four-headed echidna penis | Pursuit by The University of Melbourne
Nine of the Weirdest Penises in the Animal Kingdom | Science | Smithsonian Magazine
Male echidnas have FOUR-headed penises but scientists crack breeding in captivity | Daily Mail Online
Meet the world's weirdest creature with a four-headed penis and spikes on its tongue - Mirror Online
Echidna's Male Organ has Four Heads - YouTube
The Creature Feature: 10 Fun Facts About the Echidna | WIRED
1 shaft, 4 heads: The echidna's penis. | Pygmy Loris
So this is how the four-headed penis of an echidna actually works | SYFY WIRE
Echidna penises: Why they're so weird - Australian Geographic
Solving the mystery of the four-headed echidna penis | Pursuit by The University of Melbourne
The Creature Feature: 10 Fun Facts About the Echidna | WIRED
Echidnas have a unique 4-headed penis but only use half at a time | CBC Radio
Echidnas have a unique 4-headed penis but only use half at a time | CBC Radio
What if you had a 4-Headed Penis like the Echidna? Do you want a Giant Electric Blue Penis like the Leopard Slug? Here's some of the Weirder Penises in the animal kingdom -
Ekidna, a Strange Animal from Papua with 4 Penises - Good Morning Papua
Echidna penises: Why they're so weird - Australian Geographic
An Echidna's Penis Has Four Heads, New Study Reveals How It Works | Mental Floss
Meet the world's weirdest creature with a four-headed penis and spikes on its tongue - Mirror Online
Solving the mystery of the four-headed echidna penis | Pursuit by The University of Melbourne
