Five plots located in a single small valley (9 Km2) were selected in order to study several attributes of bird communities. The control plot is an unburned old pine grove, while the other four plots correspond to different stages after the fire (1, 2, 4 and 8 years after). The control plot has the highest diversity values (13 species, H' = 3.16). This diversity values decreases greatly just after the fire. Even for the last stage of the succession studied (the 8 years plot) the diversity value are lower than those for the control plot. Bird density also decreases considerably alter the fire; nevertheless the density values obtained for the 8 years stage are much higher than the initial values (232 vs. 101 birds/10 Ha.). We observed that several species were responsible for this change. The 1 year stage plot has the closest index of bird specific similarity when compared to the obtained for the control plot. The reason for this resemblance might be the similar vegetation profile of these two plots, although trees and shrubs are obviously dead in the burned one.
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