3 ms·
> Male echidnas have a four-headed penis. During mating, the heads on one side "shut down" and do not grow in size; the other two are used to release semen into
by vasco 3y ago
> Male echidnas have a four-headed penis. During mating, the heads on one side "shut down" and do not grow in size; the other two are used to release semen into the female's two-branched reproductive tract. Each time it copulates, it alternates heads in sets of two. When not in use, the penis is retracted inside a preputial sac in the cloaca. The male echidna's penis is 7 centimetres (2.8 in) long when erect, and its shaft is covered with penile spines. These may be used to induce ovulation in the female.
- askonomm 3y agoHoly crap. Tell me again why the heck are we so interested in trying to find aliens when we have plenty bizarre stuff walking the earth with us?
- TheGoddessInari 3y agoBecause the aliens are already here, just like the echidna...
- lakpan 3y agoWith plenty of bizarre stuff on earth, my pet peeve is having aliens depicted as anthropomorphic.
- m463 3y agoThat's what I thought the first time I went snorkeling in tropical waters. It's too bad population seems to crowd out the majority of wildlife on the ground. If it wasn't for birds, a majority of people wouldn't see much backyard wildlife, ever.