Original Title: La invernada de las aves en el Área de Gibraltar
Summary:
This paper deals with the wintering bird communities of the more extensive habitats of Gibraltar area (grasslands, shrublands and cork-oak forests). The results, exposed in tables I and II, point out very high densities of birds. The peculiar bioclimatic features of this area explain these facts. Grasslands are the more seasonal habitat and support the highest densities of birds. Shrublands and cork-oak forests are much more impermeable habitats to wintering birds because they support more stable bird communities. Finally, the influence of coastal leading lines in densities of some wandering birds is discussed.
