Tui De Roy / Atlantic yellow-nosed albatross (Thalassarche chlororhynchos). nesting amid Blechnum palmiforme tree ferns. Gough Island, Gough and Inaccessible Islands UNESCO World Heritage Site, South Atlantic.

Nick Garbutt / Adult Helmet Vanga (Euryceros prevostii) incubating a clutch of 3 eggs. Nest constructed in the fork of a Bird's Nest Fern (Asplenium sp.) Masoala National Park, north east Madagascar.

Tui De Roy / Atlantic yellow-nosed albatross (Thalassarche chlororhynchos). nesting on fern slopes. Gough Island, South Atlantic

Tui De Roy / Atlantic yellow-nosed albatross (Thalassarche chlororhynchos) nesting on fern slopes. Gough Island, Gough and Inaccessible Islands UNESCO World Heritage Site, South Atlantic.

Ingo Arndt / Bird's Nest Fern (Asplenium nidus) and view of east coast at sunset, Christmas Island National Park, Christmas Island, Indian Ocean, Australian Territory

Cyril Ruoso / Bird's nest ferns (Asplenium nidus) on a granite boulder, Yakushima island, Japan.

Cyril Ruoso / Bird's nest fern (Asplenium nidus) growing on a granite boulder, Yakushima Island, Japan, November.

Nick Garbutt / Helmet Vanga (Euryceros prevostii) nest including a clutch of 3 eggs. Nest constructed in the fork of a Bird's Nest Fern (Asplenium sp.) Masoala National Park, north east Madagascar.

Tim Laman / Bird's Nest Fern (Asplenium nidus) growing on the side of a tree trunk high in the rainforest canopy, Gunung Palung National Park, Borneo, West Kalimantan, Indonesia

Tim Laman / Bird's Nest Fern (Asplenium nidus) growing on the side of a tree trunk high in the rainforest canopy, Gunung Palung National Park, Borneo, West Kalimantan, Indonesia

Alan Watson / Tree in rainforest at 800m with birds nest fern (Asplenium nidus), Andasibe-Mantadia National Park, Madagascar January 2009

James Aldred / Canopy scientist, John Pike, being winched up to study epiphytic Birds nest fern {Asplenius sp} growing in lowland Dipterocarp tree {Shorea shorea} Danum valley, Sabah, Borneo, Malaysia, 2005