Great Crested Terns on rock, Sri Lanka

action actions adult adults afrasia afro eurasia asia august bird birds coast coasts continent continental area count counting description descriptions ecosystem ecosystems enumeration enumerations eurafrasia eurasia flap wings flapping wings flaps wings flight flights flutter fly (to) flying greater crested tern (sterna bergii) greater crested terns (sterna bergii) group groups image and subject in flight indian ocean indian subcontinent individual individuals iucn iucn red list of threatened species iucn status landmass landmasses least concern (iucn) lc least concern species littoral (shore) littorals (shore) localisation localization location low risk (iucn) lr marine and coastal wetland area marine and coastal wetland areas marine and coastal wetland zone marine and coastal wetland zones matter (substance) matters (substance) mineral matter mineral matters month of year months of year motion motions natural area natural areas nature ocean oceans old world pose posed posing recording recordings rock (stone) rock fragment rock fragments rock piece rock pieces rock shore rock shores rocks (stone) rocks fragments rocks pieces rocky coast rocky coasts rocky shore rocky shores sea sea and coastal water sea bird sea birds sea water seas seaside seasides settling settlings shoting shotings south asia southern asia species sri lanka stage of development tern (sterne) terns (sternes) texture textures three quarter length three quarter shot three quarter shots three quarter sight three quarter sights three quarter view three quarter views time scale time scales tropical ocean tropical oceans tropical sea tropical seas uicn wild animal wild animals wild fauna wild faunae world sea and ocean world seas and oceans