Resumen de Observacions de la dispersió ornitòcora del llampúdol (Rhamnus alaternus)
Between May 24th and June 3rd of 1994 a total of 5 1/2 hours were devoted to the systematic observations of the birds coming to eat the fruit of the Mediterranean buckthorn (Rhmnnus alaternus) on a property in the center of Mallorca. Of the 5 species of bird who are potential consumers (and dispersers) of the fruit, only 2 were seen eating them: the Sardinian warbler (Sylvia rnelanocephala) and Marmora's warbler (Sylvia sarda).
Thirty-five of the recorded feeding visits were of the S. melanocephala, involving the removal of 43 fruits. Only 3 of the visits were of the S. sarda (1 fruit caten in each of them), but it should be noted that the density of this species in the area studied seems considerably lower than that of the first.' The short duration of the visits of the S. melanocephala, and especially the fact that in over half of them the bird left without swallowing the last fruit handled, suggests that this warbler is using the fruit to supplement the diet of its young.
