Invasion success and tolerance to urbanization in birds

Cities are considered hotspots of biological invasions, yet it remains unclear why non‐indigenous species are so successful in environments that most local native species do not tolerate. Here, we explore the intriguing possibility that humans may be unintentionally introducing species preadapted to persist in such environments. Combining data on historical introductions with information of avian assemblages along urban–wildland gradients, we...