Mark Hamblin / 2020VISION / Northern gannet (Morus bassanus / Sula bassana) on nesting cliffs, Hermaness National Nature Reserve, Unst, Shetland Isles, Scotland, UK, June 2010.

Mark Hamblin / 2020VISION / Adult Barn swallow (Hirundo rustica) collecting mud at pool for nest building, Inverness-shire, Scotland, UK, May.

Mark Hamblin / 2020VISION / Female Red-throated diver (Gavia stellata) incubating eggs, Shetland Isles, Scotland, UK, June.

Peter Cairns / 2020VISION / Northern gannets (Morus bassanus) at nesting colony on cliffs, June

Peter Cairns / 2020VISION / Northern gannets (Morus bassanus) at nesting colony on cliffs, Hermaness NNR, Unst, Shetland Islands, Scotland, UK, June

Dietmar Nill / Male and female Golden oriole (Oriolus oriolus)settling at nest and vocalising, before the male takes flight, Bulgaria, June

Dietmar Nill / Female Golden oriole (Oriolus oriolus) landing at nest to feed chicks, Bulgaria, June

Mark Hamblin / 2020VISION / Adult Barn swallow (Hirundo rustica) collecting mud at pool for nest building, Inverness-shire, Scotland, UK, May 2011

David Tipling / 2020VISION / Avocet (Recurvirostra avosetta) at nest, Cley, Norfolk, England, UK, June

Mark Hamblin / 2020VISION / Man photographing colony of Northern gannets (Morus bassanus / Sula bassana) on nesting cliffs, Hermaness National Nature Reserve, Unst, Shetland Isles, Scotland, UK, June 2010.

Markus Varesvuo / Northern Gannet (Morus bassanus), in flight carrying nest material. Iceland. June.

Ammonite / Female Northern royal flycatcher (Onychorhynchus coronatus mexicanus) nest building, Santa Rosa National Park, Costa Rica.