Estacion Biologica Pitilla is a remote biological station in Northwestern Costa Rica at 10°59’N, 85°26’W. Pitilla is located in and administered by the Area de Conservacion Guanacaste (ACG). The ACG incorporates both Santa Rosa National Park and Guanacaste National Park (GNP) into a much larger and continuous conservation area. Pitilla is in the area of the former GNP. It is located 9 km south-west of the village of Santa Cecilia, accessible on a rough mud road by 4-wheel drive vehicles. The station lies on the side of a mountain, in the mid-elevation (700m) tropical rainforest biome, on the interface of primary forest and reclaimed pastureland. From here, a network of trails allows access to the primary and secondary forest as well as open fields. Expect very high humidity and frequent, abrupt rainstorms which will last from 1 minute to 3 days. Temperature is pleasant, around 18 to 28°C. It is often sunny, but sunscreen is only needed if you walk down the exposed road (else the forest provides enough shade). Bring lots of insect repellent, and some anti-itch creme. The structure itself is a large (30m x 100m) hacienda-style tin-roofed wooden station which consists of the following: -two dorm rooms, each with 5 bunk beds, one washroom with flush toilet and cold (stream) water shower. The West dorm room has the bonus ammenity of a mirror. -kitchen with a propane stove, sink and food storage cupboard. -open work areas. -living quarters for the park staff. -horse stable. -wide verandah around entire station for working. There is a small amount of electricity generated by solar panels, enough to power a compact fluorescent lightbulb in the kitchen and each dorm room each evening. Flashlights, candles, and kerosene lamps are all useful. The station is visited by troupes of Capuchin monkeys, Keel-Billed toucans, tree frogs, the occasional snake, bats, spiders (both resident and transient), and lots and lots of bugs.