Emily Willingham, PhD - #PenisPerDiem 2: meet the echidna. It looks built by committee, as monotremes do, and its penis is no exception. A four-part glans (tip) makes this entry outstanding in
![Echidnas' 'bizarre' mating no longer obstacle to successful breeding program | Animal welfare | The Guardian Echidnas' 'bizarre' mating no longer obstacle to successful breeding program | Animal welfare | The Guardian](https://i.guim.co.uk/img/media/330c833d453a01154ddfe4b3f8c7f2a61ba9d206/0_0_517_310/master/517.jpg?width=1200&height=900&quality=85&auto=format&fit=crop&s=43306ef256e81cdc0db09c39594f343d)
Echidnas' 'bizarre' mating no longer obstacle to successful breeding program | Animal welfare | The Guardian
![Australian researchers discover why only two of echidna's four penis heads become erect at one time | Australia news | The Guardian Australian researchers discover why only two of echidna's four penis heads become erect at one time | Australia news | The Guardian](https://i.guim.co.uk/img/media/3559d0d68afaf94e75bf51143509274fefffafc5/0_138_4372_2622/master/4372.jpg?width=1200&height=1200&quality=85&auto=format&fit=crop&s=688fe7ca1639c1e9e95ba0ed6f04c9e2)
Australian researchers discover why only two of echidna's four penis heads become erect at one time | Australia news | The Guardian
![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 - 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 -](https://i2.wp.com/jobbiecrew.com/wp-content/uploads/2020/11/0pennn.jpg?ssl=1)
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 -
![One of the biggest monotreme mysteries is the echidna penis, which has four separate heads, or glans, at the end of the shaft. If that wasn't weird enough, only two of the One of the biggest monotreme mysteries is the echidna penis, which has four separate heads, or glans, at the end of the shaft. If that wasn't weird enough, only two of the](https://preview.redd.it/ovz6j1rwb2671.jpg?width=640&crop=smart&auto=webp&s=ceea4aed3c347dc53a7730a02127ff8684df6098)
One of the biggest monotreme mysteries is the echidna penis, which has four separate heads, or glans, at the end of the shaft. If that wasn't weird enough, only two of the
![Australian researchers discover why only two of echidna's four penis heads become erect at one time | Australia news | The Guardian Australian researchers discover why only two of echidna's four penis heads become erect at one time | Australia news | The Guardian](https://i.guim.co.uk/img/media/d3fadd01edc9b19f597c1f7d3638581ac85ee822/0_108_1440_864/master/1440.jpg?width=445&quality=45&auto=format&fit=max&dpr=2&s=dd15a176712741d3f02dad3249464a5f)
Australian researchers discover why only two of echidna's four penis heads become erect at one time | Australia news | The Guardian
![4 testicles... Like the human equivalence to an echidna penis. - #160270556 added by saltysloth at High Art 4 testicles... Like the human equivalence to an echidna penis. - #160270556 added by saltysloth at High Art](https://2static1.fjcdn.com/comments/4+testicles+like+the+human+equivalence+to+an+echidna+penis+_6e1c7fb10869f6db1eba62d3276e06a2.jpg)
4 testicles... Like the human equivalence to an echidna penis. - #160270556 added by saltysloth at High Art
![Male echidnas have FOUR-headed penises but scientists crack breeding in captivity | Daily Mail Online Male echidnas have FOUR-headed penises but scientists crack breeding in captivity | Daily Mail Online](https://i.dailymail.co.uk/i/pix/2015/09/25/05/2CBD4A8600000578-0-image-a-3_1443154488702.jpg)