Are there really no featherless bipeds besides us?

[Leo_Bloom]

No, the second joke…
ETA: Wow, a Handbook of Humor.

[Darren_Garrison]

@CalMeacham

Quite a few saurischian dinosaurs were bipedal, but it now appears that a lot of them had feathers, which makes them ineligible for your definition.

There were also bipedal crocodylomorphs. And the common ancestor of all dinosaurs was bipedal. (That common ancestor may or may not have had something like a very early proto-feather, but nothing that looks featherish to the modern eye.)

Only Man (and Woman) do without the counterbalance. We have The Butt. Arguably our greatest innovation.

So Sir Mix-a-Lot was right?

[DrDeth]

@MrDibble

Define “us”. Because there’s a whole lot of bipedal hominins besides Homo sapiens. Also various (currently non-feathered) dinosaurs from Eoraptor on. Even archosaur proto- crocodilians like Effigia. A

But all extinct.

[Darren_Garrison]

Just ran across this bipedal red panda.

[Weisshund]

@Stranger_On_A_Train

Specifically, humans walk with plantigrade motion (toes and metatarsals in contact with the ground with the center of gravity in static balance). Few other animals walk in plantigrade fashion and those that do are primarily quadruped. (There is the instance of a bear with a damaged forelimb which walks upright but that is an abnormality due to injury.) Birds, kangaroos, and wallabys move by saltation with both legs moving in symmetric motion to produce a hopping motion. The closest any non-primate comes to bipedal motion are penguins which make a stiff waddling motion.

Stranger

I know some birds do hop hop hop, but chickens actually walk and run, and i am pretty sure an ostrich does not do a lot of hopping, would be horribly inefficient for its design?

[MrDibble]

@DrDeth

But all extinct.

That’s irrelevant if the question is about taxonomy.

[DrDeth]

@MrDibble

That’s irrelevant if the question is about taxonomy.

**
“Are there really no featherless bipeds besides us?**”

Extinct animals dont count. The questions wasnt “Were there really no featherless bipeds besides us at any point in time?”