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Less bird diversity in city forests

Yellowhammer bird sitting at a tree. Photo: Lars Johansson/Mostphoto

A new study led by Lund University with researchers at BECC shows that cities negatively affect the diversity of birds. There are significantly fewer bird species in urban forests compared with forests in the countryside - even if the forest areas are of the same quality.

The researchers examined 459 natural woodlands located in or near 32 cities in southern Sweden. They counted the occurrence of different bird species, and the result is clear: in natural forests located in a city center, there are on average a quarter fewer species of forest birds compared to forests outside the city. In terms of endangered species, about half as many species were found in urban forests compared to rural forests.

Further reading

Read the article in full at

Link to the article in Global Change Biology:
Urbanization causes biotic homogenization of woodland bird communities at multiple spatial scales