Described in the journal PLOS One, female Nazca boobies (Sula granti) will openly mate with potentially dozens of males before settling on a parenting partner. But over 74 days of observation, biologists documented female Nazca boobies freely selecting multiple sexual partners, with one topping the list at 16 different males. Lek mating refers to when certain animal species’ males congregate and compete for female attention via elaborate courtship displays. “Many of these female boobies are really freewheeling it when it comes to sexual behavior.”The Nazca boobies’ trysts aren’t constant occurrences, however. According to the study’s authors, the answer can be phrased as its own question: What choice do the male Nazca boobies have?