Ingo Arndt / Cape gannets (Morus capensis / Sula capensis) at nesting colony, zooming from tight to wide shot, Lamberts Bay, South Africa, December

Ingo Arndt / Bed of Blue mussels (Mytilus sp.) densely packed together on rock, Lamberts Bay, South Africa

Ingo Arndt / Cape Gannet (Sula capensis) perched on a rock whilst calling, nesting colony, Lamberts Bay, South Africa.

Cheryl-Samantha Owen / Cape gannet (Morus capensis) colony, Bird Island Nature Reserve, Lambert's Bay, West Coast, South Africa.

Tony Heald / Cape gannet {Sula / Morus capensis} coming in to land in colony, Lamberts bay, South Africa.

Tony Heald / Cape gannets preening, courtship behaviour {Morus capensis} Lamberts Bay South Africa

Andrew Parkinson / Wave breaking on coast of Bird Island, Lamberts Bay, South Africa

Andrew Parkinson / Cape gannet (Morus capensis) pair, courtship behaviour, in colony, Bird Island, Lamberts Bay, South Africa, vulnerable species

TOM WALMSLEY / Cape gannet landing {Morus capensis} at nest colony on Bird island, Lamberts bay, South Africa

Ingo Arndt / Cape Gannet (Sula capensis) nesting colony with bow of light in the fog, Lamberts Bay, South Africa.

Ingo Arndt / Cape Gannet (Sula capensis) pair on rock in nesting colony, Lamberts Bay, South Africa.

Ingo Arndt / Cape Gannet (Sula capensis) nesting colony, Lamberts Bay, South Africa.