Merlin, Ontario, Canada


Urbanization and birds

Urbanization is one of the most dramatic ways that humans influence nature. As habitats become altered by urbanization, most species do not survive, and yet a few species persist and even thrive. What determines which species persist in urban environments, and which species do not?

We are striving to answer this question, focusing on a select group of species for which we have specific ecological and behavioural data. Missing from our dataset is accurate information about which species of birds breed in the largest cities around the world. For this, we are asking for your help — we are surveying birders and ornithologists from around the globe who best know the cities and their birds.

Each survey takes about 10 minutes or less to complete. Surveys include only our focal species, so some species that breed in your city might not be included. In addition, many species that are listed might not breed in cities. All surveys are anonymous, unless you would like to provide your information at the end.

Click on your continent below to find your city ...


Can't find your city? We have included cities from around the world with a human population of 750,000 or more (based on United Nations data). In cases where cities were within 100km of each other, we included only the largest city, thus leaving out some prominent cities (e.g., San Francisco).




cities - North America, Central America, Caribbean


cities - Europe

cities - Asia
cities - South America
cities - Africa



cities - Australia, New Zealand


You can find more information about us and our research here:

Dr. Fran Bonier, Dept. of Biology, Queen's University

Dr. Paul R. Martin, Dept. of Biology, Queen's University