Distribució de les poblacions d\'ocells nidificants del Parc Natural de Sant Llorenç del Munt i l\'Obac (1999-2001)

Distribution of breeding bird populations in Sant Llorenç del Munt i l’Obac Nature Park (1999-2001) This paper presents the distribution of breeding bird populations in Sant Llorenç del Munt i l’Obac Nature Park. For each of the species recorded in the years included in the sample we provide a graphic representation of its distribution in the Nature Park, by dividing