Robin Chittenden / Birdwatchers and twitchers observing Arctic warbler (Phylloscopus borealis) Wells, Norfolk, England, UK. September 2017.

David Tipling / Twitchers gathering to watch White-crowned Sparrow (Zonotrichia leucophrys) at Cley, North Norfolk, England, UK, January 2008.

David Tipling / Twitchers and photographers at Baillon's Crake, Grove Ferry, Kent, UK

Staffan Widstrand / Birdwatching ecotourism, Ivvavik NP, Yukon, Canada.

DAVID TIPLING / Birdwatchers viewing a Pallid swift Cliffe Kent UK