Paul Bertner / Giant Crab Spider (Sparassidae) juvenile, Hitoy Cerere Biological Reserve, Costa Rica

Piotr Naskrecki / Mayfly subimago, La Selva Biological Research Station, Heredia, Costa Rica

Konrad Wothe / La Paz Waterfalls in rainforest, Costa Rica

Mark Moffett / Granular Poison Dart Frog (Dendrobates granuliferus) portrait on bird's nest fungus, Corcovado National Park, Costa Rica

Bob Barbour / Surfer known as 'Wingnut, ' Costa Rica

Michael & Patricia Fogden / White-nosed Coati (Nasua narica) stealing banana from a tree, rainforest, Costa Rica

Michael & Patricia Fogden / Lianas in interior of lowland rainforest, La Selva Biological Research Station, Costa Rica

Gerry Ellis / Magnificent Hummingbird (Eugenes fulgens) nest with three eggs, Costa Rica

Mark Moffett / Rainforest researcher Pierre Berner studies tree growth, Rio Macho Forest Reserve, Costa Rica

Greg Basco/ BIA / Fallen seeds and leaves in rainforest, Costa Rica

Greg Basco/ BIA / Llanos de Cortez Waterfall, Guanacaste, Costa Rica

Greg Basco/ BIA / Sunlight shining through rainforest, Rincon de la Vieja National Park, Costa Rica