John Chan / Black skimmer (Rynchops niger) skimming water surface / feeding, Southern California, USA, July.

Neil Aldridge / African skimmer (Rynchops flavirostris) flying low over the Chobe River, skimming the water, at sunset, Chobe National Park, Botswana.

Tony Heald / Black skimmer (Rynchops flavirostris) fishing by skimming along water surface, Pantanal, Brazil

Alan Murphy / Swallow-tailed Kite (Elanoides forficatus) hunting, Florida

Winfried Wisniewski / African Skimmer (Rynchops flavirostris) skimming, Chobe River National Park, Botswana

Brent Stephenson / Flying Fish (possibly Cheilopogon suttoni) skimming across sea surface. Between the Tuamotus and Marquesas, French Polynesia, Pacific Ocean, October.

Marie Read / Black Skimmer (Rynchops nigra), skimming with its open beak just below the water's surface in search of prey, Bolsa Chica Ecological Reserve, California, USA (Digitally retouched image - space added...

Rolf Nussbaumer / Black skimmer skimming at sunset {Rynchops nigra} Florida, USA

Flip Nicklin / Sperm Whale (Physeter macrocephalus) adult with attached Remoras skimming ocean surface, Dominica

Tony Heald / African skimmer skimming {Rynchops flavirostris} Chobe NP, Botswana

John Chan / Black skimmer (Rynchops niger) hunting for fish, Southern California, USA, June.

John Chan / Black skimmer (Rynchops niger) hunting for fish, Southern California, USA, June.