Cyril Ruoso / Inmates of the Cedar Creek Corrections Center raising endangered Oregon spotted frog (Rana pretiosa) Prisoners in this facility are raising endangered frogs for release in the wild, as part of the Sus...

Will Watson / Free-roaming Aldabra giant tortoise (Geochelone gigantea), feeding on cabbage leaf, introduced onto Prison Island, Zanzibar, Tanzania. January.

Cyril Ruoso / Oregon spotted frog (Rana pretiosa) in tank, prisoner observing in background. Prisoners involved in conservation projects. Washington State Prison, Cedar Creek Correction Center, Shelton, Washington,...

Nick Upton / Harbour entrance with Bourtzi Island, a Venetian fortress once used as a prison, in the background, Nafplio, Argolis, Peloponnese, Greece, August 2017.

Paul Williams / Boab or Australian Baobab tree (Adansonia gregorii) the 'prison tree' used as a prison for aboriginal people on their way to sentencing, 1800s. Derby, Western Australia.

Paul Williams / Boab or Australian Baobab tree (Adansonia gregorii) the 'prison tree' used as a prison for aboriginal people on their way to sentencing, 1800s. Derby, Western Australia.

Jurgen Freund / The 'Prison' Australian baobab / Boab' tree (Adansonia gregorii) which was used to lock up prisoners, Wyndham. Kimberley, Western Australia. August 2016.

Jurgen Freund / The 'Prison' Australian baobab / Boab tree (Adansonia gregorii) which was used to lock up prisoners, Wyndham. Kimberley, Western Australia. August 2016.

Jurgen Freund / Prison Boab tree / Australian baobab (Adansonia gregorii) which was used to lock up prisoners, Wyndham. Kimberley, Western Australia. July 2016.

Jurgen Freund / The 'Prison' Boab tree / Australian baobab (Adansonia gregorii) which was used to lock up prisoners, Wyndham. Kimberley, Western Australia. July 2016.

Cyril Ruoso / Oregon spotted frog (Rana pretiosa) biologist Mark Hayes looking at frog raised by inmates as part of sustainability in prison program, Cedar Creek Corrections Center, Washington, USA. Non-ex

Cyril Ruoso / Inmates of the Cedar Creek Corrections Center raising endangered Oregon spotted frog (Rana pretiosa) Prisoners in this facility are raising endangered frogs for release in the wild, as part of the Sus...

Cyril Ruoso / Humorous sign in Cedar Creek Corrections Center 'Frog parking only - all others will be toad'. Prisoners in this facility are raising endangered Oregon spotted frog (Rana pretiosa) for release in the...

Cyril Ruoso / Humorous sign in Cedar Creek Corrections Center 'Frog parking only - all others will be toad'. Prisoners in this facility are raising endangered Oregon spotted frog (Rana pretiosa) for release in the...

Cyril Ruoso / Inmates of the Cedar Creek Corrections Center and biologists taking photographs of Oregon spotted frog (Rana pretiosa) Prisoners in this facility are raising endangered frogs for release in the wild,...

Cyril Ruoso / Inmates of the Cedar Creek Corrections Center and biologists taking photographs of Oregon spotted frog (Rana pretiosa). Prisoners in this facility are raising endangered frogs for release in the wild,...

Cyril Ruoso / Inmate in Cedar Creek Correction Center, checking for microchip in Oregon Spotted Frog (Rana pretiosa). Prisoners in this facility are raising endangered frogs for release in the wild, as part of the...

Cyril Ruoso / Inmate in Cedar Creek Correction Center, checking for microchip in Oregon Spotted Frog (Rana pretiosa). Prisoners in this facility are raising endangered frogs for release in the wild, as part of the...

Cyril Ruoso / Inmates of the Cedar Creek Corrections Center and biologists taking photographs of Oregon spotted frog (Rana pretiosa).Prisoners in this facility are raising endangered frogs for release in the wild,...

Cyril Ruoso / Inmate in Cedar Creek Correction Center, checking for microchip in Oregon Spotted Frog (Rana pretiosa). Prisoners in this facility are raising endangered frogs for release in the wild, as part of the...

Cyril Ruoso / Biologist Mark Hayes looking at Oregon Spotted Frog (Rana pretiosa) raised by inmates in the Cedar Creek Correction Center. Prisoners in this facility are raising endangered frogs for release in the w...

Cyril Ruoso / Biologist implanting microchip into Oregon Spotted Frog (Rana pretiosa) raised by inmates in the Cedar Creek Correction Center. Prisoners in this facility are raising endangered frogs for release in t...

Cyril Ruoso / Inmate in Cedar Creek Correction Center, checking for microchip in Oregon Spotted Frog (Rana pretiosa). Prisoners in this facility are raising endangered frogs for release in the wild, as part of the...

Cyril Ruoso / Biologist Mark Hayes looking at Oregon Spotted Frog (Rana pretiosa) raised by inmates in the Cedar Creek Correction Center. Prisoners in this facility are raising endangered frogs for release in the w...

Cyril Ruoso / Inmates tending to native prairie plant seedlings as part of Sustainability in Prison program, Stafford Creek Corrections Center, Washington, USA. September 2012.

Cyril Ruoso / Inmates tending to native prairie plant seedlings as part of Sustainability in Prison program, Stafford Creek Corrections Center, Washington, USA. September 2012.

Cyril Ruoso / Inmates tending to native prairie plant seedlings as part of Sustainability in Prison program, Stafford Creek Corrections Center, Washington, USA. September 2012.

Cyril Ruoso / Inmates tending to native prairie plant seedlings as part of Sustainability in Prison program, Stafford Creek Corrections Center, Washington, USA. September 2012.

Cyril Ruoso / Inmates tending to native prairie plant seedlings as part of Sustainability in Prison program, Stafford Creek Corrections Center, Washington, USA. September 2012.

Cyril Ruoso / Inmates tending native prairie plant seedlings as part of Sustainability in Prison program, Stafford Creek Corrections Center, Washington, USA. September 2012.

Cyril Ruoso / Inmates tending native prairie plant seedlings as part of Sustainability in Prison program, Stafford Creek Corrections Center, Washington, USA. September 2012.

Cyril Ruoso / Cedar Creek Correction Center which is part of the Sustainability in Prisons Projects raising endangered species such as the Oregon spotted frog (Rana pretiosa) Washington, USA. September 2012.

Cyril Ruoso / Inmate beekeeper with honeycomb of Honey Bee (Apis mellifera). Inmates in this prison are keeping bees as part of the Sustainability in Prison program, Cedar Creek Corrections Center, Washington, USA....

Cyril Ruoso / Inmate beekeeper with honeycomb of Honey Bee (Apis mellifera). Inmates in this prison are keeping bees as part of the Sustainability in Prison program, Cedar Creek Corrections Center, Washington, USA....

Cyril Ruoso / Cedar Creek Correction Center which is part of the Sustainability in Prisons Projects raising endangered species such as the Oregon spotted frog (Rana pretiosa) Washington, USA. September 2012.

Cyril Ruoso / Inmate beekeeper with honeycomb of Honey Bee (Apis mellifera). Inmates in this prison are keeping bees as part of the Sustainability in Prison program, Cedar Creek Corrections Center, Washington, USA....

Cyril Ruoso / Organic garden tended to by inmate as part of Sustainability in Prison program, Cedar Creek Corrections Center, Washington, USA. September 2012.

Cyril Ruoso / Chilli plant in organic garden tended to by inmates as part of Sustainability in Prison program, Cedar Creek Corrections Center, Washington, USA. September 2012.

Cyril Ruoso / Organic garden tended to by inmate as part of Sustainability in Prison program, Cedar Creek Corrections Center, Washington, USA. September 2012.

Cyril Ruoso / Pumpkin (Cucurbita pepo) growing in organic garden tended to by inmates as part of Sustainability in Prison program, Cedar Creek Corrections Center, Washington, USA. September 2012.

Cyril Ruoso / Oregon spotted frog (Rana pretiosa) biologist releasing frog that was raised by inmates as part of Sustainability in Prison program, Washington, USA. September 2012.

Cyril Ruoso / Oregon spotted frog (Rana pretiosa) biologist releasing frog that was raised by inmates as part of Sustainability in Prison program, Washington, USA. September 2012.

Cyril Ruoso / Oregon spotted frog (Rana pretiosa) biologist releasing frog that was raised by inmates as part of sustainability in prison program, Washington, USA. September 2012.

Cyril Ruoso / Oregon spotted frog (Rana pretiosa) biologist Mark Hayes checking on released frogs that were raised by inmates as part of Sustainability in Prison program, Washington, USA. September 2012.

Cyril Ruoso / Oregon spotted frog (Rana pretiosa) biologist Mark Hayes checking on released frogs that were raised by inmates as part of Sustainability in Prison program, Washington, USA. September 2012.

Cyril Ruoso / Inmate checking on Oregon spotted frog (Rana pretiosa) in breeding tank. Prisoners in this facility are raising endangered frogs for release in the wild, as part of the Sustainability in Prisons Proje...

Cyril Ruoso / Inmates of the Cedar Creek Corrections Center raising endangered Oregon spotted frog (Rana pretiosa) Prisoners in this facility are raising endangered frogs for release in the wild, as part of the Sus...

Cyril Ruoso / Inmates of the Cedar Creek Corrections Center raising endangered Oregon spotted frog (Rana pretiosa) Prisoners in this facility are raising endangered frogs for release in the wild, as part of the Sus...