Terry Whittaker / Grey heron ( Ardea cinerea) flying to bin. Herons congregate around the fish stalls as city markets are closing, picking up scraps of food. Amsterdam, Netherlands. April.

Cheryl-Samantha Owen / Lynn Ballagh closing gate on his cattle ranch, Sandhills of Nebraska, Garfield County, Nebraska, USA.

Morley Read / Clown treefrog (Dendropsophus reticulatus) closing its eyes, Amazon rainforest, Orellana Province, Ecuador. (non-ex)

Tony Wu / Manchurian crane (Grus japonensis) closing nictitating membrane of eye, portrait. Hokkaido, Japan. March. Sequence 3/3.

Tony Wu / Manchurian crane (Grus japonensis) closing nictitating membrane of eye, portrait. Hokkaido, Japan. March. Sequence 2/3.

Tony Wu / Manchurian crane (Grus japonensis) closing nictitating membrane of eye, portrait. Hokkaido, Japan. March. Sequence 1/3.

Heather Angel / Crocus (Crocus sp) flower from above, closing in evening. Focus stacked.

Heather Angel / Southern magnolia / Bull bay (Magnolia grandiflora) flower. The opening and closing of petals controls the time beetle pollinators enter and leave the flower. Cultivated in garden, Surrey, England, UK...

Terry Whittaker / Grey Herons ( Ardea cinerea) congregating around the fish stalls as city markets are closing, picking up scraps of food. Amsterdam, Netherlands. April.

Terry Whittaker / Grey Herons ( Ardea cinerea) congregating around the fish stalls as city markets are closing, picking up scraps of food. Amsterdam, Netherlands. April.

Terry Whittaker / Grey Heron ( Ardea cinerea) congregating around the fish stalls as city markets are closing, picking up scraps of food. Amsterdam, Netherlands. April.

Terry Whittaker / Grey Heron ( Ardea cinerea) flying near fish stalls as city markets are closing, to pick up scraps of food. Amsterdam, Netherlands. April.