[card_zero]

Yes, only humans, birds, sifakas, pangolins, kangaroos, and giant ground sloths. Only those six groups of creatures, and various lizards including the Jesus lizard which is bipedal on water, just those seven groups and sometimes goats and bears.

[trescenzi]

I get what you mean, that’s why the basically is there. Most, kangaroos and some lemurs in your list being the exception, do not move around primarily as bipeds. The ability to walk on two legs occasionally is different than genuinely having two legs and two arms.

[coldtea]

And once every while, my cat.