Urban biodiversity isn’t just limited to buzzing insects. Last year, a study found that 54 cities are home to 20 percent of the world’s bird species. In the city of Lyon, scientists found nearly a third of all the bee species native to France. It turns out that cities are a good place for some animals to live- and how humans decide to manage their cities can make those habitats better or worse for the local fauna… Anyone who has ever walked through a flock of pigeons knows birds do pretty well in cities, too. That isn’t to say that birds prefer cities- urban areas only retain about 8 percent of the bird species that otherwise would have lived in the area, according to a study led by Myla Aronson of Rutgers University… But cities are still filled with a rich variety of birds. Aronson and her team looked at 54 cities around the world and found that 20 percent of known bird species can be found flying in urban centers…”From city to city, across the world, maintaining natural habitat within a city is important for biodiversity,” Aronson told NBC News.