Sylvain Cordier / Hunters out shooting small game wearing hi-visibility jackets, Bas-Rhin, France, November.

Loic Poidevin / Aquatic warbler (Acrocephalus schoenobaenus) Breton Marsh, Vendee, France, May.

Bernard Castelein / Black-capped donacobius (Donacobius atricapilla) perched on two reeds, Municipal protected area of Pampas del Yacuma, Bolivia.

Juan Carlos Munoz / Man cutting Pampas grass (Cortaderia selloana), Miera Valley, Valles Pasiegos, Cantabria, Spain. October, 2017.

Juan Carlos Munoz / Road warning sign in Portmagee Harbour, County Kerry, Republic of Ireland. September 2015.

Chris Mattison / Pampas landscape with tussocks of grass, Patagonia, Chile.

Gabriel Rojo / Greater rhea (Rhea americana) resting on grass, La Pampa , Argentina

Juan Manuel Borrero / Pampas grass (Cortaderia selloana) Delta del Llobregat Natural Park, Barclelona, Spain, September

Jean E. Roche / Aerial view of clumps of Pampas grass (Cortaderia seloana) an invasive species in the Camargue, Southern France, September 2008

Martin Gabriel / Pampas Grass (Cortaderia selloana), Kaltern near Bozen, Northern Italy, September 2008

Colin Monteath / Pampas Grass (Cortaderia sp) , Kaikoura, Canterbury, New Zealand

Colin Monteath / Pampas Grass (Cortaderia sp), Kaikoura, Canterbury, New Zealand

Colin Monteath / Domestic Sheep (Ovis aries) grazing with Silver Pampas Grass (Cortaderia selloana) in the foreground, South Island, New Zealand

Theo Allofs / Toetoe (Cortaderia sp) grass, New Zealand

Gerry Ellis / Pampas Grass (Cortaderia sp) islands in old lava flow, Llaima Volcano, Conguillio National Park, Chile

Daniel Gomez / Gaucho prepares to burn grassland. Land management. Ibera NR, Argentina, South America

Daniel Gomez / Roofing grass {Panicum sp} Rincon Santa Maria NR, Corrientes, Argentina, South America

Daniel Gomez / Cardoon / Artichoke thistle {Cynara cardunculus} Argentina brought into South America in grass seed by Spanish settlers. Now a weed in Pampas grasslands displacing native species. Cardo de Castilla

Daniel Gomez / Grasslands around Ibera NR, Argentina, South America

Daniel Gomez / Grassland burning to renew pasture for cattle grazing. Ibera NR, Argentina, South America

Gabriel Rojo / Pampas grey fox (Lycalopex gymnocercus) sitting in Pampas grass (Cortaderia selloana), La Pampa province, Patagonia, Argentina.

Gabriel Rojo / Pampas grey fox (Lycalopex gymnocercus) standing among Pampas grass (Cortaderia selloana) licking its lips, La Pampa province, Patagonia, Argentina.

David Maitland / Autofluorescence image of a cross section through the tip of the growing leaf-whorl of Pampas grass (Cortaderia selloana) exposed to UV light, the chlorophyll fluoresces red and the lignin blue. The &...