John & Mary-Lou Aitchison / Flock of Barnacle geese (Branta leucopsis) flying over the sea, Islay, Inner Hebrides, Scotland, UK, November.

Pal Hermansen / Barnacle geese (Branta leucopsis) with goslings, swimming past icebergs, Jokulsarlon, Iceland, June.

Pal Hermansen / Barnacle geese (Branta leucopsis) with goslings, Jokulsarlon ice field, Iceland, June.

Pal Hermansen / Barnacle geese (Branta leucopsis) with goslings, Jokulsarlon ice field, Iceland, June.

David Tipling / 2020VISION / Barnacle geese (Branta leucopsis) taking-off from grazing field, Solway Firth, Dumfries and Galloway, Scotland, UK, December

Markus Varesvuo / Barnacle goose (Branta leucopsis) in flight, Helsinki Finland

Markus Varesvuo / Four Barnacle Geese flying (Branta leucopsis) Finland

Markus Varesvuo / Flock of Barnacle Geese flying over water (Branta leucopsis) Finland

Konrad Wothe / Barnacle Goose (Branta leucopsis) carrying goslings, Bavaria, Germany

Danny Green / 2020VISION / Barnacle Geese (Branta leucopsis) in flight at sunset, Caerlaverock WWT, Scotland, Solway, UK, January.

Markus Varesvuo / Barnacle goose (Branta leucopsis) flock in field, Helsinki, Finland, October

Roy Mangersnes / Two Barnacle geese (Branta leucopsis) in flight, Spitsebergen, Svalbard, Norway, August

David Tipling / 2020VISION / Flock of Barnacle geese (Branta leucopsis) feeding on grazing marshes, Caerlaverock WWT, Dumfries and Galloway, Scotland, UK, December

David Tipling / 2020VISION / Large flock of Barnacle geese (Branta leucopsis) taking off from grazing marshes, Caerlaverock WWT, Dumfries and Galloway, Scotland, UK, December

David Tipling / 2020VISION / Barnacle geese (Branta leucopsis) feeding on grazing marshes, with one bird wing stretching, Caerlaverock WWT, Dumfries and Galloway, Scotland, UK, December

Andrew Parkinson / Barnacle geese (Branta leucopsis) flock flying in dense winter fog. Dumfries and Galloway, Scotland, UK, January (non-ex)

John Downer / Barnacle geese {Branta leucopsis} in flight, imprinted geese trained to fly beside car, captive, UK

Wild Wonders of Europe / Liodden / Barnacle goose (Branta leucopsis) in snow, Spitsbergen, Svalbard, Norway, June 2009. WWE INDOOR EXHIBITION

Wild Wonders of Europe / Lundgren / Gooseneck barnacles (Lepas anatifera) on a drifting rope, Pico, Azores, Portugal, June 2009

Andy Rouse / Barnacle geese (Branta leucopsis) taking off, Islay, Scotland

Wild Wonders of Europe / Novák / Barnacle geese (Branta leucopsis) in flight, Westerhever, Germany, April 2009

Wild Wonders of Europe / Novák / Barnacle goose (Branta leucopsis) with grass in beak, Nabu center, Katinger Watt, Eiderstedt, Germany, April 2009

Wild Wonders of Europe / Novák / Barnacle geese (Branta leucopsis) in field, Westerhever, Germany, April 2009

Wild Wonders of Europe / Novák / Barnacle goose (Branta leucopsis) flock in flight at sunset, Westerhever, Germany, April 2009

Konrad Wothe / Giant Green Sea Anemone (Anthopleura xanthogrammica) group, Goose Barnacles (Lepas anserifera) group and Ochre Sea Stars (Pisaster ochraceus) at low tide, Olympic National Park, Washington

Colin Varndell / Barnacle goose portrait {Branta leucopsis} England UK

Brandon Cole / Close up of Goose barnacles {Pollicipes polymerus} British Columbia, Canada, Pacific North West NOT FOR SALE IN USA

Norbert Wu / Goose Barnacle (Lepas sp) group filter feeding, attached to fisherman's float, North Pacific

John Downer / Barnacle geese in flight over water {Branta leucopsis} UK

John Cancalosi / Barnacle Geese {Branta leucopsis} standing on ice UK

David Kjaer / Barnacle geese flying, England, UK {Branta leucopsis}

David Woodfall / Barnacle Geese (Branta leucopsis) on machair. North Uist, Outer Hebrides, Scotland, UK, March.

David Woodfall / Barnacle Geese (Branta leucopsis) and sheep on machair. Berneray, Outer Hebrides, Scotland, UK, March.

David Woodfall / Barnacle Geese (Branta leucopsis) and sheep on machair. Berneray, Scotland, Outer Hebrides, UK, March.

SCOTLAND: The Big Picture / Barnacle goose (Anser brachyrhynchus) flock in flight with Paps of Jura in background, Islay, Scotland, UK, March.

SCOTLAND: The Big Picture / Barnacle geese, (Branta leucopsis) , flock in flght over farmland, Islay, Scotland, UK., March

SCOTLAND: The Big Picture / Barnacle geese, (Branta leucopsis) , flock grazing on croft land, Islay, Scotland, UK., March

Jaymi Heimbuch / Leaf Barnacle (Pollicipes polymerus) group, California Mussels (Mytilus californianus), and White Acorn Barnacles (Balanus glandula), Lincoln City, Oregon

Jaymi Heimbuch / Leaf Barnacle (Pollicipes polymerus) group at sunset, Yaquina Head Outstanding Natural Area, Newport, Oregon

Ann & Steve Toon / Barnacle geese (Branta leucopsis) in flight, Caerlaverock WWT reserve, Dumfries & Galloway, Scotland, October

Nick Upton / Flock of Barnacle geese (Branta leucopsis) and a single Red-breasted goose (Branta ruficollis) drinking from a freshwater pool on a saltmarsh bordering the Severn estuary, Gloucestershire, UK, Februar...

Nick Upton / Barnacle geese (Branta leucopsis) taking off as a hunting Red fox (Vulpes vulpes) stands on the saltmarsh they were resting on, Severn estuary, Gloucestershire, UK, February.

Nick Upton / Barnacle geese (Branta leucopsis) taking off as a hunting Red fox (Vulpes vulpes) walks across the saltmarsh they were resting on, Severn estuary, Gloucestershire, UK, February.

Paul Williams / Ochre starfish (Pisaster ochraceus) Goose barnacles (Pollicipes polymerus) California mussel (Mytilus californianus) and Giant green anenome (Anthopleura xanthogrammica) in rock pool, Vancouver Island...

Paul Williams / Ochre starfish (Pisaster ochraceus), Goose barnacles (Pollicipes polymerus) and California mussel (Mytilus californianus) in rock pool, Vancouver Island, British Columbia, Canada, July.

Paul Williams / Goose barnacles (Pollicipes polymerus) and California mussel (Mytilus californianus), Vancouver Island, British Columbia, Canada, June.

Paul Williams / Goose barnacles (Pollicipes polymerus) and California mussel (Mytilus californianus), Vancouver Island, British Columbia, Canada, June.

Tony Wu / Ram's horn squid / Little post horn squid (Spirula spirula) internal shell with Pelagic goose barnacles (Lepas sp.). South Africa, Atlantic Ocean.

Jussi Murtosaari / Barnacle goose (Branta leucopsis), flock in flight, Finland, October.

Nick Upton / Barnacle goose (Branta leucopsis) migrant flock in flight, with many more grazing a fallow field, Matsalu National Park, Estonia, September.

Nick Upton / Barnacle goose (Branta leucopsis) migrant flock flying in to join others resting and foraging at a roost site, Matsalu Bay at dusk, Matsalu National Park, Haeska, Estonia, September.

Nick Upton / Migrating Barnacle geese (Branta leucopsis) in flight near the coast, Matsalu National Park, Estonia, September.

Nick Upton / Barnacle goose (Branta leucopsis) migrant flock in flight at dusk, Matsalu National Park, Estonia, September.

Nick Upton / Barnacle goose (Branta leucopsis) migrant flock silhouetted in flight at dusk, Matsalu National Park, Estonia, September.

Nick Upton / Barnacle goose (Branta leucopsis) migrant flock flying over reedbeds near the shore of Matsalu Bay at dusk, Matsalu National Park, Haeska, Estonia, September.

Nick Upton / Barnacle goose (Branta leucopsis) migrant flock grazing a fallow arable field in Matsalu National Park, Estonia, September.

Nick Upton / Barnacle goose (Branta leucopsis) migrant flock in flight overhead near the coast at dusk, Matsalu National Park, Estonia, September.

Nick Upton / Barnacle goose (Branta leucopsis) migrant flock in flight overhead near the coast, Matsalu National Park, Estonia, September.

Nick Upton / Large flock of migrant Barnacle geese (Branta leucopsis) in flight over Matsalu Bay, Haeska, Matsalu National Park, Estonia, September.

Nick Upton / Flock of Barnacle geese (Branta leucopsis) grazing, resting and bathing on partly flooded saltmarshes on the Severn estuary, Gloucestershire, UK, February.

Jussi Murtosaari / Barnacle goose (Branta leucopsis) group feeding, Baltic Sea, Finland, June.

Jussi Murtosaari / Barnacle goose (Branta leucopsis) flock on way to Siberia, Finland, May.

Dave Bevan / Barnacle goose (Branta leucopsis) feeding in a flower filled meadow, Gloucestershire, England, UK. May.

John & Mary-Lou Aitchison / Small flock of Barnacle geese (Branta leucopsis) in flight, Islay, Inner Hebrides, Scotland, UK, November.

John & Mary-Lou Aitchison / Barnacle geese (Branta leucopsis) flying over the sea towards land, Islay, Inner Hebrides, Scotland, UK, November.

John & Mary-Lou Aitchison / Barnacle geese (Branta leucopsis) flock feeding in a field, Islay, Inner Hebrides, Scotland, UK, November.

John & Mary-Lou Aitchison / Barnacle geese (Branta leucopsis) in flight over the sea at dusk, Islay, Inner Hebrides, Scotland, UK, November.

Ingo Arndt / Flock of Barnacle Geese (Branta leucopsis) in flight, Germany, April.

Pal Hermansen / Barnacle geese (Branta leucopsis) In settlement, Svalbard, Norway, July. Small repro only.

Pal Hermansen / Barnacle goose (Branta leucopsis) and chick, Svalbard, Norway, July.

Danny Green / RF- Barnacle Geese (Branta leucopsis) among ice. Jokulsarlon Glacier, Iceland. June . (This image may be licensed either as rights managed or royalty free.)

Bernard Castelein / Barnacle geese (Branta leucopsis) flock in flight, Zeeland, the Netherlands, March

Bernard Castelein / Barnacle geese (Branta leucopsis) flock in flight, Zeeland, the Netherlands, March

Bernard Castelein / Barnacle geese (Branta leucopsis) flock landing on water, Zeeland, the Netherlands, March

Bernard Castelein / Barnacle geese (Branta leucopsis) in flight, Zeeland, the Netherlands December

Bernard Castelein / Barnacle geese (Branta leucopsis) two resting on grass, Zeeland, the Netherlands December

Alex Hyde / Pelagic Gooseneck Barnacle / Smooth Gooseneck Barnacle colony (Lepas anatifera) attached to plastic bottel washed up on a beach following heavy storms. This species is found attached to flotsam floati...

Pal Hermansen / Barnacle geese (Branta leucopsis) adults swimming with goslings, Jokulsarlon, Iceland, June

Ann & Steve Toon / Barnacle geese (Branta leucopsis), Caerlaverock Wildfowl and Wetlands Trust Reserve, Dumfries and Galloway, Scotland, October 2015

Ann & Steve Toon / Barnacle geese (Branta leucopsis), Caerlaverock Wildfowl and Wetlands Trust reserve, Dumfries and Galloway, Scotland, October

Pal Hermansen / Barnacle geese (Branta leucopsis) with goslings, Jokulsarlon ice field, Iceland, June.

Niall Benvie / Barnacle geese (Branta leucopsis) in flight,, Islay,Scotland, UK, February.

Jussi Murtosaari / Barnacle goose (Branta leucopsis), adult with two goslings, Ruissalo, Turku, Finland, June.

Nick Upton / Barnacle goose (Branta leucopsis) flock in flight, Gloucestershire, UK, March.

Solvin Zankl / Common goose barnacle (Lepas anatifera) on a piece of plastic. Sargasso Sea, Bermuda

Ole Jorgen Liodden / Barnacle Goose (Branta leucopsis) flapping wings, Svalbard, Norway, July.

Ole Jorgen Liodden / Barnacle goose (Branta leucopsis) pair flying in front of mountains, Storfjorden, Svalbard, Norway, June.

Jussi Murtosaari / Barnacle goose (Branta leucopsis) adult in flight, Ruissalo, Turku, Lounais-Suomi, Varsinais-Suomi / Southwestern Finland, Finland. September

Jussi Murtosaari / Barnacle goose (Branta leucopsis) flock in flight, Ruissalo, Turku, Lounais-Suomi, Varsinais-Suomi / Southwestern Finland, Finland. September

Jussi Murtosaari / Barnacle goose (Branta leucopsis) flying adult, Ruissalo, Turku, Lounais-Suomi, Varsinais-Suomi / Southwestern Finland, Finland. September

Jussi Murtosaari / Barnacle goose (Branta leucopsis) three adults in flight, Ruissalo, Turku, Lounais-Suomi, Varsinais-Suomi / Southwestern Finland, Finland. September

Andy Trowbridge / Barnacle Goose (Branta leucopsis) close-up portrait. Southern Norway. October.

Philippe Clement / Goose barnacles (Lepas anatifera) Aquitaine, France, May.

Philippe Clement / Goose barnacle (Lepas anatifera) washed onto beach, Aquitaine, France, May.

Philippe Clement / Goose barnacles (Lepas anatifera) on white background, Aquitaine, France, May.

Philippe Clement / Blue goose barnacle / buoy barnacle (Dosima fascicularis) washed onto beach, Bay of the Somme, France, May.