Gerrit Vyn / Snowy Owl (Bubo scandiacus) fluffing feathers, this image was taken during a massive increase in the range and population of snowy owls. Boundary Bay, Canada. March.

Nigel Cattlin / Southwest coast path through National Trust's Golden Cap Estate, looking west towards Charmouth. Lyme Bay, Dorset, England, UK. May 2017.

Ashley Cooper / Rose bay willowherb (Chamerion angustifolium) flowering in the Lyth Valley, Cumbria, England, July.

Roger Powell / Eurasian magpie (Pica pica) cleaning its beak on a fencepost. Protecting its eye by lowering the nictitating membrane. Druridge Bay, Northumberland, UK, April.

Nick Upton / Sand dunes heavily eroded and protective fence left suspended by winter storms and tidal surges, Daymer Bay, Trebetherick, Cornwall, UK, March 2014.

Nick Upton / Sand dunes heavily eroded and protective fence left suspended by winter storms and tidal surges, Daymer Bay, Trebetherick, Cornwall, UK, March 2014.

Brent Stephenson / New Zealand fuchsia (Fuchsia excorticata) flower showing the blue pollen present on hermaphroditic plants, Boundary Stream, Hawkes Bay, New Zealand, November.

Brent Stephenson / Onga onga / New Zealand stinging nettle (Urtica ferox) close up of the stinging spines and fresh leaves, Boundary Stream, Hawkes Bay, New Zealand, November.

Brent Stephenson / Ongaonga / New Zealand stinging nettle (Urtica ferox) seedling covered in stinging spines, Boundary Stream, Hawkes Bay, New Zealand, November.

Brent Stephenson / Ongaonga / New Zealand stinging nettle (Urtica ferox) close up of the stinging spines along the mid-rib of the leaf, Boundary Stream, Hawkes Bay, New Zealand, November.

Brent Stephenson / Ongaonga / New Zealand stinging nettle (Urtica ferox) close up of the stinging spines along stem, Boundary Stream, Hawkes Bay, New Zealand, November.

Brent Stephenson / Male New Zealand falcon (Falco novaeseelandiae) on lichen covered branch, Boundary Stream, Hawkes Bay, New Zealand, November.