Jabruson / 'Kith' / 'Kin' Sumatran orangutan (Pongo abelii) captive animal in walled enclosure, Perth Zoo, Western Australia, August 2001.

David Tipling / House Martin (Delichon urbicum) leaving nest under eaves of house, Northumberland, UK, July

Ernie Janes / Apricot tree (Prunus ameniaca) Moorpark variety in blossom trained against a wall in walled garden, UK, March.

Ernie Janes / Conference Pear tree (Pyrus communis) growing against wall in garden, UK

Stephen Dalton / Common garden snail (Helix aspersa) on brick wall, England, UK

Michael Hutchinson / Groundsel {Senecio sp} growing out of brick wall covered in colourful graffiti, Bristol, UK

Alan Williams / Blue mason bee (Osmia caerulescens) resting on brick wall in garden. Cheshire, England, UK. June.

Robin Chittenden / Black redstart (Phoenicurus ochruros) male, Norfolk, England, UK. January.

Kim Taylor / Hairy-footed flower bee (Anthophora plumipes) male looking out from hole in brick wall. Surrey, England, UK, April.

Nick Upton / Swift nestbox on a house wall alongside hollow "swift brick" entrances to nest boxes in a roof space, Worlington, Suffolk, UK, July.

Mark MacEwen / Brick wall in the Blue City, Jodhpur, Rajasthan, India.

Stephen Dalton / Herb robert (Geranium robertianum) growing against brick wall, Sussex, England, UK, May.