The insect lays its eggs on animals like flies or mosquitoes. Those insects become hosts, carrying the human botfly eggs to human skin — the warmth of which hatches the eggs into larvae, researchers ...

Entomologist and wildlife photographer Piotr Naskrecki is not squeamish. He recently allowed two human bot fly larvae to grow to maturity under his skin and documented the process in a short film.

Nota bene: This week’s creature is a spine-covered parasitic larva that burrows into living human beings, feeding on their flesh and growing positively plump. Some descriptions here might be hard to ...