Bence Mate / Leaf cutter ants (Atta sp) carrying pieces of fern, reflected in water, Costa Rica.

Ole Jorgen Liodden / Chatham stream on the main Chatham island, New Zealand, March 2014.

Bence Mate / Leaf cutter ants (Atta sp) female worker ants carry pieces of fern leaves to nest, reflected in water, Costa Rica, December. Winner, Eric Hosking award, 2011 Wildlife Photographer of the Year competit...

Wild Wonders of Europe / della Ferrera / Black maidenhair fern (Adiantum capillus veneris) with water falling past, near Kravice falls, Trebizat River, Bosnia and Herzegovina, May 2009

Wild Wonders of Europe / Tønning / Halerbach / Haupeschbach flowing between large moss covered rocks with Male ferns (Dryopteris filix mas) growing, Beaufort, Mullerthal, Luxembourg, May 2009

Juan Manuel Borrero / River with Ferns on bank. Lombadas Valley Nature Reserve, Sao Miguel Island, Azores, Portugal.

Juan Manuel Borrero / Salto do Prego waterfall. Faial da Terra, Sao Miguel Island, Azores, Portugal. 2019.

Juan Manuel Borrero / Salto do Cabrito waterfall flowing over rockface. Lombadas Valley Nature Reserve, Sao Miguel Island, Azores, Portugal.

Andy Rouse / Tawny owl (Strix aluco) sitting, reflected in pool. UK. June.

Heather Angel / Frog (Rana temporaria) spawn amongst invasive Fairy fern (Azolla filiculoides) from garden pond. Photographed in aquarium, controlled conditions. Surrey, England, UK. March.

Heather Angel / Fairy fern (Azolla filiculoides) and Water forget me not (Myosotis scorpioides) in frozen garden pond. Surrey, England, UK. January.

Duncan Murrell / Tree ferns on the Mangamate Track in Whirinaki Forest Park, North Island, New Zealand.