A hierarchy of alienness: Pictures of animals from least to most related to you.
Least-related animal: Sponges. You and sponges are both animals. That's basically all you've got in common.
This is a black vulture allopreening (cleaning) a crested caracara.
Black vultures sometimes preen caracaras, but caracaras have never been observed preening vultures; caracaras often bully vultures and steal carrion from them.
The reason for the one-sided preening is
Doesn't appear to be intentional behavior by the caracaras and it's not super commonly observed.
Just sometimes the caracara does "head-down" just right, the vulture goes into preen mode, and the caracara goes "kinda weird, but ok I guess you can clean me."
that caracaras sometimes bob their heads ("head-down" display) in a way that's similar to the motion black vultures make to invite preening.
The black vultures instinctively respond, a bit like a mother bird blindly feeding a cuckoo chick because "in my nest = feed."
You and starfish are both deuterostomes: "second mouth," animals characterized by their anus forming before their mouth during embryonic development.
Kinda weird to think you're more closely related to a starfish than an octopus or a butterfly, isn't it?
You and chimpanzees are both members of the tribe Hominini: "the tribe of man."
But chimpanzees and bonobos are both part of the genus Pan (named for the Greek god of nature and wilderness), while humans are part of the genus Homo ("man"). They are our closest living relatives.