This video says about itself:
16 December 2008
A Super Natural Adventure into the misunderstood world of the bat. Filmed on location at Tirimbina Rainforest Center in Costa Rica. Ryan Jacobus explains all about the jungle ecosystem and the bat’s amazing ability to use echo location to find its prey.
From The Costarican Times:
Christmas Bat Count Reveals New Bats in Costa Rica
Every year, on the 11th and 12th of December, people from Panama to Mexico go outside for a very different type of event, the Christmas Bat Count.
The event is organized by the Central American Strategy for Bat Conservation and the Latin American and Caribbean Network for the Conservation of Bats.
The search for bat species occurred in Santa Rosa National Park, La Amistad International Park, Tirimbina Biological Reserve, Cabo Blanco Nature Reserve, Palo Verde National Park, Monteverde, Barva Volcano National Park, Diria National Park and the Barra Honda National Park. This allowed observers to work in three ecosystems; rainforest, cloud forest and dry forest.
A total of 61 species were seen. Seven hairy-legged vampire bats were observed, which are not common in the country. Another surprise was that the fruit bat, which is usually in middle lands, was spotted in Guanacaste.