Ah yes, when they're grazing. Sometimes you can see families of them grazing, and they lift their heads to see if you're a threat. If worried, the whole community leaps away. Some areas you seldom see them. You do come across solitary kangaroos hopping across the road in country areas. I love them. Tame ones eat pellets...like guinea-pig food pellets...from your palm with the gentlest touch.
Usually in official photos you see them upright, that's true, and toy kangaroos also. A similar leaping marsupial is the wallaby. Wallabies are smaller.
I've noticed that the phrase "kangaroo court" found its way into American parliance, at least, I've heard it in American films.
I'll add some more of my kangaroo photos to the album.
They graze somtimes on my youngest son's property