Time to end war on birds and find a way to coexist, say experts

Discovery that some species build nests from anti-bird spikes highlights growing awareness in UK that deterrents don't work

It seems like the ultimate revenge: birds have been found constructing nests from the very spikes meant to deter them from perching on buildings. But while humans have no shortage of tactics to wage against unwanted birds, experts say it's time to abandon the war.

Though there are myriad ways to deter or remove birds from city roofs, train stations and other settings - from spikes to fire gel, professional falconers and even plastic owls - it seems many lead to only a temporary reprieve.