Chris Mattison / Giant pill millipede (Arthrosphaera cf branti), captive, occurs Tanzania.

Tim Laman / Close up of young boy aged 9 (model released) watching a Giant Pill millipede (Sphaerotherium) Borneo, July 2007

Pete Oxford / Giant millipede {Sphaerotherium sp} Madagascar

MYN / Lily Kumpe / Pill millipede (Cynotelopus notabilis) Western Australia. Meetyourneighbours.net project.

MYN / Lily Kumpe / Pill millipede (Cynotelopus notabilis) William Bay National Park, Western Australia. Meetyourneighbours.net project.

MYN / Lily Kumpe / Pill millipede (Cynotelopus notabilis) curled up, William Bay National Park, Western Australia. Meetyourneighbours.net project.

MYN / Lily Kumpe / Pill millipede (Cynotelopus notabilis) curled up, William Bay National Park, Western Australia. Meetyourneighbours.net project.

Alex Hyde / Sequence of Pill millipede (Glomeridae) unrolling from a defensive position, Danum Valley, Sabah, Borneo. Digital composite.

Alex Hyde / Pill millipede (Glomeridae) Danum Valley, Sabah, Borneo.

Alex Hyde / Pill millipede (Glomeridae) rolled into a defensive ball. Danum Valley, Sabah, Borneo.

Alex Hyde / Pill millipedes (Glomeridae) rolled up in defensive position, Danum Valley, Sabah, Borneo.

Adrian Davies / Pill millipede (Glomeridae), rolled into defensive ball. Danum Valley, Sabah, Borneo

Cyril Ruoso / Pill millipede (Glomeris sp) Gunung Leuser NP, Sumatra, Indonesia.

Enrique Lopez-Tapia / Madagascar green-emerald giant pill millipedes (Zoosphaerium neptunus) Andasibe-Mantadia National Park. Madagascar.

Enrique Lopez-Tapia / Madagascar green-emerald giant pill millipedes (Zoosphaerium neptunus) Andasibe-Mantadia National Park. Madagascar.

Enrique Lopez-Tapia / Madagascar green-emerald giant pill millipede (Zoosphaerium neptunus) Andasibe-Mantadia National Park. Madagascar.

John Abbott / Sphaeriodesmid Pill Millipede (Sphaeriodesmidae) Cayo District, Belize.

John Abbott / Sphaeriodesmid Pill Millipede (Sphaeriodesmidae) in ball, Cayo District, Belize.

MYN / Gil Wizen / Pill millipede (Procyliosoma striolatum) composite image of uncurling sequence, see images 1468356 - 1468359. Fiordland National Park, South Island, New Zealand, February. Composite image. Meetyournei...

MYN / Gil Wizen / Pill millipede (Procyliosoma striolatum) Fiordland National Park, South Island, New Zealand, February. Sequence 4 of 4. Meetyourneighbours.net project.

MYN / Gil Wizen / Pill millipede (Procyliosoma striolatum) uncurling, Fiordland National Park, South Island, New Zealand, February. Sequence 3 of 4. Meetyourneighbours.net project.

MYN / Gil Wizen / Pill millipede (Procyliosoma striolatum) curled up. Fiordland National Park, South Island, New Zealand, February. Sequence 1 of 4. Meetyourneighbours.net project.

MYN / Joris van Alphen / Pill millipede (Glomeris connexa) curled into defensive ball, Crocker Range, Borneo, Malaysia. Meetyourneighbours.net project

Cyril Ruoso / Pill Millipede (Glomeris sp) rolled up in defensive position, Gunung Leuser National Park, Sumatra, Indonesia

Cyril Ruoso / Pill Millipede (Glomeris sp) rolled into a protective ball, Kalimantan, Indonesia

Chris Mattison / Giant pill millipede (Arthrosphaera cf branti), captive, occurs Tanzania.

Chris Mattison / Giant pill millipede (Arthrosphaera cf branti), captive, occurs Tanzania.

MYN / Denis Palanque / Pill millipede (Glomeris marginata) woodland, Savoie, France, June. meetyourneighbours.net project

MYN / Denis Palanque / Pill millipede (Glomeris marginata) rolled up for defence, woodland, Savoie, France, June. meetyourneighbours.net project

Niall Benvie / Composite of insects, arachnids and plants found on the Arnos Vale BioBlitz, Bristol, UK, June 2012 meetyourneighbours.net project. Orange ladybird (Halyzia sedecimguttata), Ivy (Hedera helix), Green...

Simon Colmer / Pill Millipede (Glomeris marginata) walking, Sussex, UK, June

Simon Colmer / Pill Millipede (Glomeris marginata) uncurling, Sussex, UK, June

Simon Colmer / Pill Millipede (Glomeris marginata) uncurling, Sussex, UK, June

Simon Colmer / Pill Millipede (Glomeris marginata) curled up for protection, Sussex, UK, June

Alex Hyde / Giant pill millipede {Sphaerotherium sp}, close-up of head. Tropical rainforest, Andasibe-Mantadia National Park, Madagascar.

Thomas Marent / Pill Millipede (Glomeridae), Danum Valley Conservation Area, Borneo, Malaysia

Nick Garbutt / Giant Pill Millipede (Sphaerotherium sp) rolled into defensive posture on forest floor. Mantadia National Park, Eastern Madagascar.

Pete Oxford / Giant pill millipede {Sphaerotherium genus} rolled up into defensive ball, La Madraka, Madagascar

Pete Oxford / Giant pill millipedes {Sphaerotherium} rolled up on hand, Madagascar

PREMAPHOTOS / Giant pill millipede {Sphaerotherium sp} feeding on rotten wood, Madagascar

PREMAPHOTOS / Giant pill millipede {Sphaerotherium sp} feedng on rotten wood, Madagascar

PREMAPHOTOS / Pill millipede {Glomeris marginata} rolled up defensively, UK

PREMAPHOTOS / Pill millipede {Glomeris marginata} rolled up defensively, UK

Pete Oxford / Giant pill millipede {Sphaerotherium sp} Mantady, Madagascar

PREMAPHOTOS / Giant pill millipede (Sphaerotherium sp) feeding on rotten wood on the floor of tropical dry forest, Madagascar

PREMAPHOTOS / Warningly coloured pill millipede (Glomeris connexa) France

Piotr Naskrecki / Pill Millipede curled up in defensive posture, Madagascar

Piotr Naskrecki / Pill Millipede curled up in defensive posture, Madagascar

Pete Oxford / Pill Millipede (Zoosphaerium sp) group from Zombitse Reserve, Madagascar

Pete Oxford / Nest of Giant pill millipedes rolled up {Sphaerotherium sp} Madagascar

Pete Oxford / Two Giant millipedes {Sphaerotherium sp} Madagascar

Pete Oxford / Giant pill millipedes rolled up on hand {Sphaerotherium sp} Madagascar

Mark Taylor / Giant Pill Millipede walking on hand. Borneo.

Kim Taylor / Pill Millipede (Glomeris species) curled and extended. UK

Mark Taylor / Giant Pill Millipede rolled in ball on hand. Borneo.

PREMAPHOTOS / Giant pill millipede rolled into ball for defence {Sphaerotherium sp.} Madagascar, tropical dry forest

Pete Oxford / Giant pill millipede {Sphaerotherum sp} Okavango, Botswana

Piotr Naskrecki / Madagascan Emerald Giant Pill Millipede (Zoosphaerium neptunus) pair, Maromizaha Reserve, Madagascar

Piotr Naskrecki / Madagascan Emerald Giant Pill Millipede (Zoosphaerium neptunus) group held by guide, Maromizaha Reserve, Madagascar

Kim Taylor / Giant pill millipede (Sphaerotherium sp) Madagascar

Chris Mattison / Close up of Pill millipede (Glomeris marginata) on dried leaf, Derbyshire, UK. April, 2011.

Chris Mattison / Close up Pill millipede (Glomeris marginata) curled up in a ball on dried leaf, Derbyshire, UK. April, 2011.