Though originating on different sides of the Atlantic, two studies released this month both underscore the complexities of wildlife adaptation to the urbanization of their habitats.
Previous studies have shown different frequencies between urban birdsong and birdsong in the wild, but until recently, no study had looked at the tropical cousins of these songbirds. Now, Alejandro Ariel Ríos-Chelén and fellow researchers at the Universidad Nacional Autonoma de Mexico have published a study that does just that.
The researchers recorded the songs of 29 male vermilion flycatchers in Mexico City and found that birds in noisier locations consistently sang for longer, assuring their song could be heard among the noise pollution. The differences between how these flycatchers’ adapted their songs for the urban environment and the adaptations that had been observed in other species suggests that different species have different methods of coping with noise pollution. Some species may be better equipped to adapt than others.
Both studies show that some species are adapting — even thriving, in the case of the redshank — to various types of pollution that come with increasing urbanization of their habitats. It remains to be seen, however, how these species will adapt in the long term, particularly as other species they rely on suffer adverse effects. One thing is certain, though. As urban areas increase, more and more wildlife will strive to adjust. We can help them by making sure our city and infrastructure planning include consideration for urban forests and urban wildlife.