The UK Green Building Council is making recommendations to improve biodiversity in urban landscapes, potentially bringing wildlife back into the city and providing green corridors "to allow mammals to commute":
Under recommendations from the UK Green Building Council (UKGBC) for developers, planners and policy-makers, otters could return to urban rivers, bats could roost under bridges, swifts could flock to office blocks and peregrine falcons could soar above cathedrals.
(Via Worldchanging.)