Plague-wary Londoners tolerated mischievous red kites and ravens for their services to the city's sanitation.
To protect urban trees, it's important to reduce the impact from construction. Advance planning and close supervision can help.
Greenwashing spin is often used to justify chopping down mature street trees.
Scientists find inequality between humans also harms the birds, the bees, the microbes and the trees.
Domestic gardens offer an oasis for urban wildlife, and are a sight for sore eyes during lockdown.
With wild boar in Barcelona and coyotes in San Francisco, the lockdown has transformed concrete jungles worldwide.
Cities often embark upon drastic and expensive eradication campaigns designed to rapidly rid the city of pests like rats. But are the surviving rats stronger or weaker than before?
A film about Cape Town's environmental resources features a cast as diverse as breakdancers and wetland activists - and is being used as a study aid globally.
Drains take up precious but inaccessible open space in our cities. Converting these to living streams running through the suburbs could make for healthier places in multiple ways.
Formby is one of the only remaining urban areas in England where red squirrels can be found at all.
These agile and unfussy animals are well-placed to exploit all the food we leave lying around.
Animals shed bits of DNA as they go about their lives. A new study of the Hudson River estuary tracked spring migration of ocean fish by collecting water samples and seeing whose DNA was present when.
Given that cities may be home to 80% of humanity by the end of the century, they can only be sustainable if eco-friendliness is one of their core features.
Urban greening programs need to consider the harmful impacts of artificial lighting on ecosystems. Fortunately, we can do a lot to create more biosensitive lighting.
Some animals love living in the urban jungle – but they are a small minority, compared to those we risk losing to urbanisation.
The rise of urban greening is an opportunity to recast the relationship between people and environment. Humans and non-human species are ecologically intertwined as inhabitants of cities.
Rats foul our food, spread disease and damage property, but we know very little about them. A biologist explains how he tracks wild rats in New York City, and what he's learned about them so far.
City-centric thinking arguably obscures connections between 'humans' and 'nature', and 'urban' and 'rural' or 'wild'. Growing evidence of the depths of these links is testing the concept of 'urban'.
The rhetoric of 'smart cities' is dominated by the economic, with little reference to the natural world and its plight. Truly smart and resilient cities need to be more in tune with the planet.
New research shows that street lighting changes the activity of moths, and is likely to disrupt nocturnal pollination.