Consider these nightmarish baby finch mouths.
https://www.audubon.org/news/whats-weird-mouths-these-finch-chicks
Peer into the mouth of a hungry African Silverbill, Gouldian Finch, or other Estrildid finch chick, and you’ll see something unexpected, intriguing, and maybe even a little unsettling: strange mouth markings. These marks—such as beaks rimmed with a black lining or glow-in-the-dark beads, and mouth roofs covered in trypophobia-inducing holes—are so disturbing to some that they’ve inspired comparisons to aliens.
That last one is some scary gear.