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The Dracula parrot is a large, heavy bird, stretching to almost half a metre from beak to tail and weighing in at almost a kilogram. It maintains all that bulk by feeding almost exclusively on figs, which researchers suspect is why it ended up with its strange semi-bald head.

Just as vultures lost the feathers on their head as an adaptation for feeding on bloody carcasses, it’s thought that the Dracula parrot did the same in response to its diet of sticky fruits – the lack of feathers around its beak and eyes mean it’s able to avoid turning its face into a matted mess.

It’s such a perfect solution to the parrot’s syrupy diet that Matt Cameron, an Australian parrot expert, asks, “If avoiding soiled and matted head feathers is a significant advantage to individuals, it is surprising that bald-headedness is not more widespread among the other fruit-eating parrots.”