Ramon Navarro / Whiskered tern (Chlydonias hybrida) passing frog prey to a chick at nest, Donana National Park, Seville, Spain, August.

Pete Oxford / Saddleback tamarin {Saguinus fuscicollis} feeding on Combretum assimile tree flowers/fruit, Madre de Dios rainforest, Peru, South America

Juan Manuel Borrero / Brown-mantled Tamarin (Saguinus fuscicollis) portrait sitting on tree branch, captive, Isla de los Monos (Monkey island). Amazon river. Loreto. Peru

Thomas Marent / Saddle-back Tamarin (Saguinus fuscicollis) looking into canopy, Pacaya Samiria National Park, Peru

Thomas Marent / Saddle-back Tamarin (Saguinus fuscicollis) calling, Pacaya Samiria National Park, Peru

Thomas Marent / Saddle-back Tamarin (Saguinus fuscicollis), Pacaya Samiria National Park, Peru

Thomas Marent / Saddle-back Tamarin (Saguinus fuscicollis) resting on liana, Pacaya Samiria National Park, Peru

Juan Manuel Borrero / Saddleback tamarin (Saguinus fuscicollis) in tree, Tambopata NP, Peru

Rod Williams / Weddell's tamarin {Saguinus fuscicollis weddelli} captive, from northern Brazil

Pete Oxford / Saddleback tamarin in tree {Saguinus fuscicollis} Madre de Dios, Peru

Pete Oxford / Saddleback tamarin {Saguinus fusicollis} in tree, Amazonia, Ecuador, South America

Miles Barton / Saddleback tamarin {Saguinus fusicollis} South America

Rod Williams / Male Red mantled tamarin {Saguinus fuscicollis illigeri} captive, from Amazonia

Pete Oxford / Saddleback tamarin {Saguinus fuscicollis} feeding on Combretum assimile tree flowers / fruits, Madre de Dios rainforest, Peru, South America

Pete Oxford / Saddleback tamarin {Saguinus fuscicollis} feeding on {Combretum assimile} tree fruits/ flowers, rainforest Madre de Dios, Perus, South America

Miles Barton / Saddleback tamarin {Sanguinus fusicollis weddelli} captive, from Central America