La avifauna de un fragmento de bosque secundario en el Valle Central, Costa Rica: su estacionalidad e implicaciÓn para la conservaciÓn

In a secondary forest, product of an abandoned coffee plantation, in the Central Valley, Costa Rica, a study of the diversity and seasonality of the avian community was carried out. The results indicate that the communityconsisted of 14 orders and 30 families. A total of 123 species was found, from which 43 are permanent residents, 8 temporary residents, while 27 species were considered as visitors. Reproductive residents are represented by 3 species and migrants by 42. The presence of long-distance migrants during the period from October to March increased the number of species found. From May to August the number of residents increased, probably because they can be detected more easily due to the increase of their vocalizations and reproductive activity, the arrival of juveniles to the population, and the seasonal movements of the hummingbirds (Trochilidae). Some resident species for the Central Valley were observed only during a short period of the year, such new arrivals are explained by: firs , the number of captured hummingbirds increased during the period from May to July, and the presence of 6 species of frugivores and insectivorous that arrived during the last days of July and stayed until January. In addition, the importance of the conservation of this forest fragment and a annoted species check-list are provided.