When most think of their Costa Rica holidays, they probably are expecting lush green scenery, great beaches, perhaps some adventure and a good mix of wildlife. You may expect to see the myriad of butterflies and tiny hummingbirds such as the scintillant hummingbird at the small end of the scale and I guess, if feeling very lucky a jaguar at the top end of the spectrum. Well with Costa Rican wildlife this spectrum can be expanded. True, it is unlikely that you will rush to see the newly discovered species of bacterium that has been found living in the hot springs of Rincon de la Vieja (around which there are some nice lodges). The species of Euglena lives in water between 40 – 98 degrees Celcius. Living in much cooler waters, much more accessible and at the larger end of the spectrum are the humpback whales that migrate along the Pacific coast of Costa Rica. In fact a marine national park, Marino Ballena, has been established and whale watching throughout the has increased in recent years with over 100 000 tourists taking excursions during their Costa Rica holidays. Humpback whales can be seen around Marino Ballena from December to April, the peak time for travel for most Costa Rica holidays.