Costa Rica Expeditions. This is the most experienced ecotourist outfit in Costa Rica, specializing in customizing countrywide nature tours and led by expert, bilingual, local naturalist guides. 2521–6099; www.costaricaexpeditions.com.
Horizontes Nature Tours. This expert ecotourist company arranges small-group and custom tours with naturalist guides and ornithologists, including nature-photography tours. 2222–2022; 888/786--8748; www.horizontes.com.