Aproximació a l'estudi dels rapinyaires "(Falconiformes)" dels massissos de Sant Llorenç del Munt-Serra de l'Obac, Montserrat i zones envoltants Authors Joan Real Abstract This work mainly focuses on the study of the status, nourishment and protection of Raptors in the aforesaid area of Catalonia, with a surface area of 486 km2, in wich a total of 17 species have been detected, 8 of which are surely nesting, 2 have been more or less recently extinguished, and the rest have been observed in their passing or accidentally. The approximate status of the nesting species is (in pairs): Accipiter gentilis (10- 15), Accipiter nisus (10-15), Buteo buteo (8-12), Hieraaetus fasciatus (3-4), Circaetus ga- Llicus (3-4), Falco peregrinus (3-5), Falco subbuteo (2-3) and Falco tinnunculus (10-15); a diversity of 2.77 bits has been observed in a sample of 140 km2. In what concerns their feeding, we may stress the importance of Oryctolagus, consumed by Hieraaetus fasciatus, Buteo buteo, and Accipiter gentilis; due to the fact of having seen their number reduced through myxomatosis, Oryctolagus seem to have been substituted by Lacerta lepida, Rattus sp. and passeriformes. We may point out the presence of Chiroptera (Pipistrellus sp.) in the diet of Falco peregrinus and Crustacea (Nephrops norvegicus) in F. tinnunculus, the last one being a product of garbage disposal areas; in all the rest, the feeding patterns are similar to the ones found in the rest of Iberia. The problems of preservation of Raptors have no doubt reached their critical point, due to the great quantities of them that are captured, to the destruction of their nests and environment, and to the poisoning they are suffering through phytosanitary products. Downloads Download data is not yet available. Downloads Text complet (Català) Published 2005-05-12 Issue Vol. 47 : 1981 (Secció de Zoologia, 4) Section Articles License The intellectual property of articles belongs to the respective authors.On submitting articles for publication to the journal Butlletí de la Institució Catalana d'Història Natural authors accept the following terms:Authors assign to Institució de la Societat Catalana d’Història Natural (a subsidiary of Institut d’Estudis Catalans) the rights of reproduction, communication to the public and distribution of the articles submitted for publication to Butlletí de la Institució Catalana d'Història Natural.Authors answer to Institució de la Societat Catalana d’Història Natural for the authorship and originality of submitted articles.Authors are responsible for obtaining permission for the reproduction of all graphic material included in articles.Institució de la Societat Catalana d’Història Natural declines all liability for the possible infringement of intellectual property rights by authors.The contents published in the journal, unless otherwise stated in the text or in the graphic material, are subject to a Creative Commons Attribution-NonCommercial-NoDerivs (by-nc-nd) 3.0 Spain licence, the complete text of which may be found at https://creativecommons.org/licenses/by-nc-nd/3.0/es/deed.en. Consequently, the general public is authorised to reproduce, distribute and communicate the work, provided that its authorship and the body publishing it are acknowledged, and that no commercial use and no derivative works are made of it.The journal Butlletí de la Institució Catalana d'Història Natural is not responsible for the ideas and opinions expressed by the authors of the published articles.