Adrian Davies / Insect hotel / Artificial nest holes and shelter for insects and invertebrates, in garden, England, UK, August 2010

Adrian Davies / Insect hotel / Artificial nest holes and shelter for insects and invertebrates, in garden, England, UK, August 2010

Nick Upton / Box bug (Gonocerus acuteangulatus) on Ivy leaves in a garden, Wiltshire, UK, September. This nationally endangered bug is spreading northwest from its former toehold in southeast UK, originally on Box...

Nick Upton / Box bug (Gonocerus acuteangulatus) on Ivy leaves in a garden, Wiltshire, UK, September. This nationally endangered bug is spreading northwest from its former toehold in southeast UK, originally on Box...

John Waters / Timelapse of Red mason bees (Osmia rufa) outside a bamboo bug box, Somerset, England, UK. May.

Nick Upton / Insect hotel with drilled logs and bundles of bamboo stems, some with partially completed mud nests of Mason wasps wasps (Ancistrocerus sp), garden, Gloucestershire, UK, May.

Nick Turner / Garden insect box positioned in apple tree, Stroud, Gloucestershire, UK. May.

Nick Turner / Garden insect box positioned in an apple tree, Stroud, Gloucestershire, UK. May.

Nick Upton / Red mason bee (Osmia rufa) male wating for females to emerge from nest holes in a drilled log within an insect hotel, Gloucestershire garden, UK, April.

Nick Upton / Insect hotel with a variety of crevices among broken pottery, drilled logs and wooden blocks, Gloucestershire, UK, April.

Nick Upton / Insect hotel with drilled logs, bundles of bamboo stems and lichen-covered bracnhes, Gloucestershire garden, UK, April.

Nick Upton / Mason wasp / Potter wasp (Ancistrocerus sp.) inspecting a nest hole in a drilled log within an insect hotel, Gloucestershire garden, UK, April.

Andy Sands / Blue mason bee (Osmia caerulescens) male emerging from bee hotel or insect box in garden, Hertfordshire, England, UK. April

Andy Sands / Blue mason bee (Osmia caerulescens) male emerging from bee hotel / insect box in garden, Hertfordshire, England, UK. April

Rod Williams / Box bug (Gonocerus acuteangulatus) nymph on leaf, Brockley cemetery, Lewisham, London, UK, September.

David Woodfall / Nest sites for solitary bees, drilled into logs, Chepstow, Wales, UK August.

David Woodfall / Nest sites for solitary bees, drilled into logs, Chepstow, Wales, UK August.

Alan Williams / Insect nest box on wall, occupied by Red mason bees (Osmia bicornis) showing most holes sealed with mud. Cheshire, UK, May.

Alan Williams / Insect nest box on wall, occupied by Red mason bees (Osmia bicornis). The bees can be seen at work with some holes already sealed with mud. Cheshire, UK, May.

Alan Williams / Close-up of insect nest box occupied by Red mason bees (Osmia bicornis) Cheshire, UK, May.

Alan Williams / Insect nest box on wall occupied by Red mason bees (Osmia bicornis). Some holes are already sealed with mud and others show yellow pollen stores to feed hatching larva. Cheshire, UK, May.

Alan Williams / Close-up of insect nest box occupied by Red mason bees (Osmia bicornis). The bees can be seen at work with some holes already sealed with mud and others containing yellow pollen stores to feed hatchin...

Alan Williams / Close-up of insect nest box occupied by Red mason bees (Osmia bicornis). The bees can be seen at work with some holes already sealed with mud and others containing yellow pollen stores to feed hatchin...

Philippe Clement / Mason bee / builder bee (Osmia cornuta) at man-made 'insect hotel' for solitary bees, sealing nest cavity with mud, Belgium, April.

Philippe Clement / Mason bee / builder bee (Osmia cornuta) at man-made 'insect hotel' for solitary bees, sealing nest cavity with mud, Belgium, April.

Philippe Clement / Man-made 'insect hotel' offering artificial nesting facilities for solitary bees and cavities for hibernating ladybirds and other insects. Made from reed and bamboo stems, drilled holes in woodblocks,...

Philippe Clement / Man-made 'insect hotel' offering artificial nesting facilities for solitary bees and cavities for hibernating ladybirds and other insects.

Philippe Clement / Man-made 'insect hotel' offering artificial nesting facilities for solitary bees and cavities for hibernating ladybirds and butterflies.

Philippe Clement / Mason bee / builder bee (Osmia cornuta) laden with pollen and nectar, entering nest in man-made 'insect hotel' for solitary bees. Belgium, April.

Philippe Clement / Mason bee / builder bee (Osmia cornuta) laden with pollen and nectar, entering nest in man-made 'insect hotel' for solitary bees. Belgium, April.

Philippe Clement / Mason bee / builder bee (Osmia cornuta) laden with pollen and nectar, entering nest in man-made 'insect hotel' for solitary bees. Belgium, April.

Alex Hyde / Bug hotel, home for insects, Nottinghamshire, UK. October.

Chris Mattison / Insect box attached to a tree in the garden, England, UK, June.

Philippe Clement / 'Insect hotel' shelter and nesting box for various insects. In blackberry bush (Rubus sp.) in garden, Belgium, June.

Philippe Clement / 'Insect hotel' shelter and nesting box for various insects. In blackberry bush (Rubus sp.) in garden, Belgium, June.

Kerstin Hinze / Insect hotel / Artificial nest holes and shelter for insects and invertebrates, Nordrhein-Westfalen, Germany

David Tipling / Young boy with ladybirds (Coccinelidae) in a bug box. Norfolk, UK, April. Model released

Nick Upton / Tawny owl (Strix aluco) chick perched at entrance to garden nest box with Cockchafer (Melolontha melolontha) prey in beak, just delivered by a parent at dusk, Wiltshire, UK. May.

Nick Upton / Tawny owl (Strix aluco) taking flight from garden nest box after delivering Cockchafer (Melolontha melolontha) prey to chick perched at entrance, Wiltshire, UK, May.

Michael Hutchinson / Box bug (Gonocerus acuteangulatus) on leylandii, Bristol, UK, March.

Nick Upton / Box bug (Gonocerus acuteangulatus) on a Greater Periwinkle (Vinca major) leaf in a garden, Wiltshire, UK, April. This nationally endangered bug is spreading northwest from its former toehold in southe...