On first inspection, the Cuban blue-headed quail dove doesn’t look like much: drab brown feathers, a slender beak, and a pronounced strut in its walk, typical of most other doves. You’d be forgiven for overlooking it in favor of Cuba’s prismatic parrots. But looks aren’t everything. For decades, this unassuming bird has perplexed biologists, who have no idea where it came from, how it got to the island or what it’s related to.