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Our Staff


Willy Aguilar
Head Guide at Tirimbina Biological Reserve

Willy owes his entry into the arena of tourism to his high school studies as much as the University in the Tourism profession, as well as being a general tour guide for the National Training Institute and Costa Rican Tourism Board (INA and ICT).
Since 2002, he has worked for several organizations in different branches, including International Youth Challenge (YCI) volunteer, People of Tradition, adventure tourism, Costa Rica Rainforest Outward Bound School (CRROBS), and as naturalist guide in the Central Pacific region and now in Sarapiquí.

He has worked with Tirimbina since 2004, has represented it in the exchange between Tirimbina and the Urban Ecology Center in Milwaukee Wisconsin, at the World Strides Science Quest in New York and Washington, D.C., and at the celebration event for the fifth anniversary of Global Travel Company, Montana.

Michael Sevilla Salazar

Michael was born in Puerto Viejo de Sarapiqui, since he was a kid he has been interested on knowing everything that has to do with nature. He had a strong motivation while he was assisting his father in the field, on projects that were carried out at La Selva Biological Station OTS; it was there when Michael began to observe and understand the nature around him.

He studied at the CTP of Puerto Viejo, where he graduated with a technician in tourism and then continued learning more and more to become a General Tourist Guide certified by the ICT-INA.

Working and enjoying his profession he began in 2003 to be interest in bird watching, one of his greatest passions which complements with nature photography. Michael is been working with great photographers around Costa Rica to capture its natural beauty.


Bernal Rodríguez Herrera
Academic Director

Bernal graduated as a biologist from the University of Costa Rica and achieved his doctorate in biology from the Ecological Institute of the National Autonomous University of Mexico (UNAM). Since 2006, he has been Academic Director of Tirimbina Biological Reserve and professor and researcher in the School of Biology and the Zoological Museum of the University of Costa Rica, working in the fields of mastozoology and conservation of mammals.
He is a member of the board of directors of the neotropical commission of the Conservation Biology society, on commissions of the North American Society of Bat Research, the Association for Conservation of Bats of Costa Rica, and a member of the group of specialists in Chiroptera for the International Union for Conservation of Nature (UICN).


  • Rodríguez-Herrera, B., R. A. Medellín, and R. M. Timm. 2007. Neotropical Tent-Roosting Bats. Instituto de Biodivesidad (INBio). 178 p.
  • LaVal R. K. & B. Rodríguez-H. 2002. Murciélagos de Costa Rica. Instituto Nacional de Biodiversidad (InBio). 310 p.


  • Rodríguez-H, B. & D. E. Wilson. 1999. Lista y distribución de las especies de Murciélagos de Costa Rica. Occasional Papers in Conservation Biology. Washington, D.C. Nº 5. 1- 34. 
  • Rodríguez-H, B., E. M. Sampaio & C. O. Handley. 1999. The Brown Disc-winged Bat, Thyroptera discifera (Lichtenstein and Peters) 1855 in Central Amazon, Brazil. Bats Reserch News. 40 (3): 73.
  • Rodríguez-H, B. & M. J. G. Hopkins. 2000. Ametrida centurio Visiting flowers of Parkia pendula (Mimosaceae), in Brazil. Bats Reserch News 41 (3): 70-71.
  • Timm, R. M, R K LaVal, & B. Rodríguez-H. 2000. Clave de Murciélagos de Costa Rica. Brenesia. 52 :1-32.
  • Rodríguez-H. B., S. Rodríguez-Brenes & M. Sagot. 2001. Tent use in Pentagonia donnell-smithii (Rubiaceae) by Vampyressa pusilla (Chiroptera: Phyllostomidae) in Costa Rica. Bats Reserch News 42 (2): 49.
  • Rodríguez-H, B., & J. Montero. 2001. Primer registro de Mimon crenulatum (Chiroptera: Phyllostomidae) en el Pacífico de Centroamérica. Brenesia 55-56: 145-146.
  • Rodriguez-Herrera, B.; F. A. Chinchilla y L. J. May-Collado. 2002. Lista de mamíferos, endemismos y conservación de los mamíferos de Costa Rica. Revista Mexicana de Mastozoología 6:21-57.
  • Rodríguez-H, B., Fernández M., Pineda W. 2002. Educación en torno a los murciélagos. Ambientales #2.
  • LaVal, R. K. & B. Rodríguez-H. 2002. Conserving Costa Rican’s Bats. Bats. Vol 20 (4): 2-6.
  • Rodríguez-Herrera, B. 2003. Los Taxidermistas del Museo Nacional, su aporte a la zoología de Costa Rica. En “El Desarrollo de las ciencias en la Costa Rica del siglo XIX” (G. Peraldo ed.) Editorial Instituto Tecnológico.
  • Sampaio E. M., Kalko, E. K. V., Bernard E., Rodríguez-Herrera, B, Handley COJr. 2003. A biodiversity assessment of bats (Chiroptera) in a lowland rainforest of Central Amazonia, including methodological and conservation considerations. Studies of neotropical fauna and environment, 38 (1):17-31.
  • Rodríguez-H, B., W. Pineda, M. Fernández & R. K. LaVal. 2003. First Record of Lasiurus intermedius H. Allen (Vespertilionidae) from Costa Rica. Bat Reserch News, Vol. 44 (3): 91p.
  • Rodríguez-Herrera, B. 2004. Distribución altitudinal, endemismo y conservación de mamíferos en la Cuenca del Río Savegre, Costa Rica. Brenesia 61(1): 53- 62.
  • Rodríguez-Herrera, B. 2004. Ampliaciones de ámbito y registro de nuevas localidades de mamíferos de Costa Rica. Brenesia 61: 125-126.
  • Rodríguez-Herrera, B., and M. Tschapka. 2005. Tent use by Vampyressa nymphaea (Chiroptera: Phyllostomidae) in Cecropia insignis (Moraceae) in Costa Rica. Acta Chriropterológica 7(1): 171-174.
  • Rodríguez-Herrera, B., D. E. Wilson, M. Fernández y W. Pineda. 2005. La Mastozoología en Costa Rica: Historia, recolecta, localidades y composición de especies. Brenesia 63-64: 89-112.
  • McCarthy T.J., J.O Matson, B. Rodríguez-Herrera and C.O Jr. Handley. Distribution, Morphometrics, and identification of Talamancan Eupaulette Bat (Sturnira mordax) in Costa Rica and Panamá. 2005. Capítulo 30:349-362. En: Contribuciones Mastozoológicas en Homenaje a Bernardo Villa. (R. Medellín & V. Cordero, eds). Comisión Nacional para el Conocimiento y uso de la Biodiversidad, México.
  • Rediscovery of the Mexican flat-headed bat Myotis planiceps (Vespertilionidae). 2005 . Arroyo-Cabrales J., E. K. V. Kalko, R. K. LaVal, J. E. Maldonado, R. A. Medellín, O. J. Polaco and B. Rodríguez-Herrera. Acta Chiropterológica 7 (2):309-318.
  • Rodríguez-Herrera, B., R. A. Medellín, M. Gamba. 2006. A tent building by female Ectophylla alba (Chiroptera:Phyllostomidae) in Costa Rica. Acta Chiropterologica 8(2): 557-561.
  • Pacheco J., G. Ceballos, G. Daily, P. R. Ehrlich, G. Suzán, B. Rodríguez-Herrera y E. Marcé. 2006. Diversidad, Historia Natural y Conservación de los Mamíferos de la Región de San Vito de Coto Brus, Costa Rica. Revista de Biología Tropical, 54 (1):219-240.
  • Barnett, A. A., E. M. Sampaio, E. K. V. Kalko, R. L. Shapley, E. Fisher, G. Camargo and B. Rodríguez-Herrera. 2006. Bats of Jaú National Park, central Amazonia, Brazil. Acta Chiropterologica 8(1): 103-128.
  • Rodríguez-Herrera B., R. A. Medellín, M. Gamba. 2008. Roosting requirements of White tent-making bat Ectophylla alba (Chiroptera:Phyllostomidae). Acta Chiropterologica 10(1):89-95.
  • Pineda W., Rodríguez-Herrera B., and Timm. R. M. 2008. Rediscovery, ecology, and identification of rare free-tailed bats (Chiroptera: Molossidae) in Costa Rica. Acta Chiropterologica, 10(1):97-102.
  • Melo F. P. L., Rodríguez-Herrera B., Chazdon, Ceballos G. G., and Medellín R. A. 2009. Small tent-roosting bats promote dispersal of large-seeded plants in a Neotropical Forest. Biotropica 41(6): 737-743.

Juan Manuel Ley López

Juan Manuel studied Biology in the University of Costa Rica, institution in which he’s currently realizing its specialization in Ecology. His licenciate thesis is about the growth and survival of seedlings in pastures and secondary forest with purpose of forest restoration in San Vito de Coto Brus, a highly deforested place in Southern Costa Rica.

He worked as biologist and resident botanist in the Osa Peninsula, where he was in charge of a reforestation project. He had work in different projects related with the flora from both dry and humid forests in Costa Rica. Since July 2012 its member of the Tirimbina Academic Department where he’s in charge of the projects related with plants.

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