Anup Shah / African Lion (Panthera leo) juvenile reaching out with curiosity, Masai Mara National Reserve, Kenya. March

Claudio Contreras / Devil's hand Tree (Chiranthodendron pentadactylon) flower, Filo de Caballos, Sierra Madre del Sur, southern Mexico, March

Juergen Freund / Hand-reared Boongary (Dendrolagus lumholtzi) feeding in a kitchen, Atherton Tablelands, Queensland, Australia.

Juergen Freund / Hand-reared Boongary (Dendrolagus lumholtzi) descending from a tree and climbing onto its carer's back, Atherton Tablelands, Queensland, Australia.

Cyril Ruoso / Keeper feeding Common woolly monkeys (Lagothrix lagotricha) in Ikamaperou Sanctuary, Amazon, Peru. October 2006.

Cyril Ruoso / Common woolly monkey (Lagothrix lagotricha) reaching forward, Ikamaperou Sanctuary, Amazon, Peru.

Staffan Widstrand / Mangrove planting team from CRINEO planting Mangrove trees (Rhizophora) Pulicat Lake, Tamil Nadu, India, February 2013.

Mark Hamblin / 2020VISION / RSPB staff warden hand sawing pine tree to create open habitat in woodland, RSPB Abernethy Forest Reserve, Cairngorms National Park, Scotland, UK, September 2011. Model released.

Terry Whittaker / 2020VISION / Woman leaning against tree, feeding Grey Squirrel (Sciurus carolinensis) in parkland, Regent's Park, London, UK, April 2011, Model released.

Tim Laman / A young boy (model released) aged 9, crossing a fallen tree bridge with a hand rope that spans the river, at the research station in Gunung Palung NP. Borneo. July 2007

Michael Durham / A three year old boy with a Pacific Tree Frog (Pseudacris regilla)

Pete Oxford / Strawberry Tree Frog (Hyla pantosticta) male on a bromeliad in the cloud forest, Carchi Province, northeastern Ecuador