Bull moose (Alces alces) calling, Wasatch Mountain State Park, Utah, United States of America, North America

Antiguan Anole Lizard (Anolis Leachii), with dewlap extended, Bermuda, North Atlantic, North America

Male Jamaican Anole Lizard (Anolis Grahami) with Dewlap extended, introduced to Bermuda in 1905 to eat fruit flies, Bermuda, Atlantic, Central America

An adult male flying dragon (Draco spp), displaying its dewlap, Komodo National Park, Komodo Island, Indonesia, Southeast Asia, Asia

Male Jamaican Anole Lizard (Anolis Grahami) with Dewlap extended, introduced to Bermuda in 1905 to eat fruit flies, Bermuda, Atlantic, Central America

Eland (taurotragus oryx) bull, showing dewlap, eastern cape, south africa

Eland (taurotragus oryx) bull, showing dewlap, eastern cape, south africa

Cayo Coco nature reserve, Cuba

Portrait of a bull moose (Alces alces) walking through an alpine meadow late in the rut in Southcentral Alaska's Chugach State Park, Alaska, United States of America

Anguilla bank anole (Ctenonotus gingivinus)

Wild Blue Iguana (Iguana iguana) Suriname, on black background