Ecologists preparing for boom in urban wildlife 'invaders'

John Vidal in the Guardian (UK): First came the urban fox, then flocks of colourful tropical parakeets. But now deer, woodpeckers, hedgehogs, jackdaws, birds of prey and exotic spiders, fish and insects are colonising British cities, say wildlife experts. Previously unseen muntjac, roe and fallow deer now boldly enter inner-city areas such as Finsbury Park in north London and have been seen in cemeteries, gardens and golf courses on the outskirts of Edinburgh, Sheffield, Bristol, Guildford and Newcastle, says the London Wildlife Trust's deputy director, Mathew Frith.

He gave a warning that people could soon expect to see wild boar in suburban streets and gardens: "It will not be too long before they impact on our urban areas. They have no natural predators, it is complicated to hunt them, and their numbers are increasing. We can expect them soon."

Birds of prey, once common in cities, have this year returned in numbers. Red kites, extinct in England and Scotland by the 1800s and down to just a few pairs 20 years ago, are now not just seen flying over London and other cities, but have been found feeding in gardens in places such as Reading, Frith says.

In a remarkable turnaround from the polluted wildlife deserts of the 1970s, inner-city parks and private gardens are now attracting creatures once practically extinct in urban areas and providing habitats for wildlife seldom seen before in Britain. The invaders, which are mostly welcomed by ecologists but worry local authorities as their numbers increase, are becoming bolder every year as they fill ecological niches....

Ringing your doorbell soon. National Park Service photo