Cheryl-Samantha Owen / Aerial photograph of the Olifants River showing the intensive agriculture along its course, a threat to the endemic fish species found here. Citrusdal and Clanwilliam area, Western Cape, South Africa. December 2013.

Ernie Janes / Bird watchers silhouetted on sand dunes at Titchwell, Norfolk, England, UK, October 2017.

David Tipling / Bird watchers looking for Golden-headed Manakin on Nando's Trail at Canopy Camp in the Darien National Park UNESCO World Heritage Site, Panama.

David Tipling / Bird watchers in the Darien National Park UNESCO World Heritage Site, Panama. February 2017.

John Waters / Bird watchers scanning reedbeds at RSPB Ham Wall Reserve. Formed from abandoned peat diggings and part of the Avalon Marshes wildlife complex on the Somerset Levels, Somerset, UK, February 2015.

John Waters / Bird watchers scanning reedbeds at RSPB Ham Wall Reserve. Formed from abandoned peat diggings and part of the Avalon Marshes wildlife complex on the Somerset Levels, Somerset, UK, February 2015.

Cheryl-Samantha Owen / Bird watchers at hide, watching colony of Cape gannets (Morus capensis). Bird Island, Lambert's Bay, South Africa. October 2014.

Steven David Miller / Bird watching hide at Marlgu Billabong, Parry Lagoons Nature Reserve, Wyndham, Western Australia

David Tipling / Birders watching dawn flight of Snow Geese (Chen caerulescens) at Bosque del Apache, New Mexico, USA, November 2009

David Tipling / Birdwatchers watching Knots (Calidris canuta) and other waders over the Wash at Snettisham RSPB Reserve, Norfolk, October 2010

David Tipling / Maltese birdwatchers monitoring migration and hunting during BirdLife Malta Springwatch camp, April 2013

David Tipling / Maltese birdwatcher monitoring migration and hunting during BirdLife Malta Springwatch camp, April 2013

David Tipling / Maltese bird watchers monitoring migration and hunting during BirdLife Malta Springwatch camp, April 2013

David Tipling / Maltese bird watchers at dawn monitoring migration and hunting during BirdLife Malta Springwatch camp, April 2013

David Tipling / Maltese bird watchers at dawn monitoring migration and hunting during BirdLife Malta Springwatch camp, April 2013

David Tipling / Maltese bird watchers at dawn monitoring migration and hunting during BirdLife Malta Springwatch camp, April 2013

David Tipling / Maltese bird watchers at dawn monitoring migration and hunting during BirdLife Malta Springwatch camp, April 2013

David Tipling / Maltese bird watchers at dawn monitoring migration and hunting during BirdLife Malta Springwatch camp, April 2013

David Tipling / Maltese bird watchers at dawn monitoring migration and hunting during BirdLife Malta Springwatch camp April 2013

Mark Hamblin / 2020VISION / Birdwatchers climbing up stairs to the Osprey hide, Dyfi Osprey Project, Powys, Wales, UK, May 2012.

Mark Hamblin / 2020VISION / Birdwatchers walking towards the Osprey hide, Dyfi Osprey Project, Powys, Wales, UK, May 2012.

Bert Willaert / Bird watchers counting raptors at the Batumi bottleneck, an imortant site for autumn raptor migration, Georgia, September 2011.

Paul Harris / 2020VISION / Two Birdwatchers looking over Rainham Marshes RSPB reserve, Essex, England, UK, November.

Paul Harris / 2020VISION / Bird watchers outside bird hide, Rainham marshes RSPB reserve, Essex, England, UK, November

Edwin Giesbers / Arctic tern (Sterna paradisaea) perched on sign welcoming bird watchers to Inner Farne Is, Farne Islands, Northumberland, UK, June 2008

Jerry Monkman / Father and his two children birdwatching in a hay field on a farm in Ipswich, Massachusetts, USA, May 2009. Model released.

David Tipling / Bird watchers digiscoping, Philippines, March 2009

Juan Carlos Munoz / Bird watchers at Hermaness Nature Reserve, Unst Island, Shetland Islands, Scotland, UK

Jason Smalley / Bird watchers viewing Eagle Owls, Forest of Bowland, Lancashire, UK

Niall Benvie / Bird watchers at cliff edge, Fowlsheugh RSPB Reserve, Grampian, Scotland

Dietmar Nill / Bird watchers watching Common cranes (Grus grus) at nature reserve / breeding grounds, Hornborgasjon, Sweden, Europe

Niall Benvie / Bird watchers observing Common cranes from outside hide, Lake Agmon, Hula valley, Israel

Niall Benvie / Bird watchers in mobile bird hide watching Common / European cranes {Grus grus}, Lake Agmon, Israel.

Tom Vezo / Bird watchers, south Padre Island Convention Center, south Padre Island, Texas

Flip de Nooyer / Bird watchers, Europe

Flip de Nooyer / Bird watchers at observation post, Netherlands