![Jo Taylor on Twitter: "Not something you get to see everyday - two # porcupines #mating caught on #cameratrap! Fun fact: did you know that male porcupines have spikes on the underside of Jo Taylor on Twitter: "Not something you get to see everyday - two # porcupines #mating caught on #cameratrap! Fun fact: did you know that male porcupines have spikes on the underside of](https://pbs.twimg.com/media/DarG5obU8AAOPNE.jpg:large)
Jo Taylor on Twitter: "Not something you get to see everyday - two # porcupines #mating caught on #cameratrap! Fun fact: did you know that male porcupines have spikes on the underside of
![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_2622/500.jpg?quality=85&auto=format&fit=max&s=7f5c2473573175af6588bb6f0466a7e9)
Australian researchers discover why only two of echidna's four penis heads become erect at one time | Australia news | The Guardian
![Meet the world's weirdest creature with a four-headed penis and spikes on its tongue - Mirror Online Meet the world's weirdest creature with a four-headed penis and spikes on its tongue - Mirror Online](https://i2-prod.mirror.co.uk/incoming/article5919135.ece/ALTERNATES/s1200c/Long-beaked-echidna.jpg)
Meet the world's weirdest creature with a four-headed penis and spikes on its tongue - Mirror Online
![Non-erectile penis of the greater cane rat ( Thryonomys swinderianus... | Download Scientific Diagram Non-erectile penis of the greater cane rat ( Thryonomys swinderianus... | Download Scientific Diagram](https://www.researchgate.net/profile/Sikiru-Olurode-2/publication/51594854/figure/fig1/AS:305948636794881@1449955247015/Non-erectile-penis-of-the-greater-cane-rat-Thryonomys-swinderianus-Temmincks-showing_Q640.jpg)
Non-erectile penis of the greater cane rat ( Thryonomys swinderianus... | Download Scientific Diagram
Australian Geographic posts echidna penis photo on Facebook without warning | news.com.au — Australia's leading news site
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
![Patricia Brennan on Twitter: "Copulation in the monogamous Indian porcupine occurs EVERY NIGHT of the year! During pregnancy, lactation and parental care... Copulation is tough: males have to approach the female bipedally Patricia Brennan on Twitter: "Copulation in the monogamous Indian porcupine occurs EVERY NIGHT of the year! During pregnancy, lactation and parental care... Copulation is tough: males have to approach the female bipedally](https://pbs.twimg.com/media/EFwLD8nXUAAvCaE.jpg)