Neil Aldridge / Urban Red fox (Vulpes vulpes) searching for food near bins in a courtyard at night, West London, United Kingdom, May 2014. Finalist in the Urban category of the Wildlife Photographer of the Year Awar...

Juan Manuel Borrero / Vertical garden on the walls of a tower block, Barcelona. Catalonia. Spain, June 2013.

Claudio Contreras / Aquatic plants (Typha sp.) with Mexico City buildings in the back, Xochimilco wetlands, Mexico City, January

Milan Radisics / Long-eared Owls (Asio otus) roosting in tree, Szeged city, Southern Hungary, February 2009

Pat Tuson / Wild Perennial Lupin (Lupinus perennis) Gillespie Park Local Nature Reserve an urban ecology park with tower blocks in background, Highbury, London Borough of Islington, England UK

SCOTLAND: The Big Picture / Woodland in spring with residential flat in background, Cumbernauld, Glasgow, Scotland, UK.May

Nick Upton / Five nestboxes for Common swifts (Apus apus) made from plastic piping, attached to the wall of a block of flats, Edgecombe, Cambridge, UK, July.

Nick Upton / Five nestboxes for Common swifts (Apus apus) made from plastic piping, attached to the wall of a block of flats, Edgecombe, Cambridge, UK, July.

Pat Tuson / Couple sitting on camping chairs on urban nature reserve with tower blocks in distance, Woodberry Wetlands, Stoke Newington, Hackney, England, Britain, UK, August 2016.

Pat Tuson / Wild flowers and reedbeds surround a sign at Woodberry Wetlands with thetower blocks of the Woodberry Down Estatein the distance. The former Stoke Newington East Reservoirin Hackneyis owned by Thames...

Pat Tuson / Wild flowers and reedbeds surround a sign at Woodberry Wetlands with the tower blocks of the Woodberry Down Estate in the distance. The former Stoke Newington East Reservoir in Hackney is owned by Tha...

Pat Tuson / Traffic direction sign with congestion charge symbol, bus and Euston Tower in background, Euston Road, Central London, UK, March 2016.