Suzi Eszterhas / Cotton-top tamarin (Saguinus oedipus), three climbing tree. Northern Colombia.

Floris van Breugel / Young California fan palm (Washingtonia filifera) in sunshine among older palms in a remote oasis in Anza-Borrego Desert State Park, California, USA March

Bernard Castelein / Common cotton grass (Eriophorum angustifolium) Klein Schietveld, Brasschaat, Belgium, May.

Lisa Hoffner / Wild Cotton-top tamarins (Saguinus oedipus) climbing up fallen branches in dry tropical forest of Colombia, South America. IUCN List: Critically Endangered

Thomas Marent / Cotton-top Tamarin (Saguinus oedipus) in tree, northern Colombia

Claus Meyer / Cotton-top Tamarin (Saguinus oedipus), Colombia

Lucas Bustamante / Ceiba or Kapok (Ceiba pentandra) tree in the Amazon Basin. Yasuni National Park, Orellana, Ecuador

Suzi Eszterhas / Cotton-top tamarin (Saguinus oedipus), two in tree. Northern Colombia.

Suzi Eszterhas / Cotton-top tamarin (Saguinus oedipus) sitting in tree, looking at camera. Northern Colombia.

Suzi Eszterhas / Cotton-top tamarin (Saguinus oedipus), two sitting in tree, looking downwards. Northern Colombia.

Suzi Eszterhas / Cotton-top tamarin (Saguinus oedipus) looking at camera whilst holding on to tree trunk. Northern Colombia.

Suzi Eszterhas / Cotton-top tamarin (Saguinus oedipus) resting on branch. Northern Colombia.